By default, we can only open the widely-used instant messaging program by Yahoo; Yahoo Messenger once at a time and the access to multiple accounts is restricted. Now, without using typical ways such as installing add-on or third-party software, you can open more than one Yahoo Messenger at a time just by running this registry tweak.

Other manual method that you can try is by loading several web-based instant messaging websites but this one is faster and permanent. Make sure you backup your registry first if you want to undo the change later.
How to: Download the registry tweak, uncompress, run the file and press OK to modify the registry.
Direct Download : Yahoo Messenger 8 | Registry Tweak (zip)
note: I have tested this tweak and it works with Yahoo! Messenger 8.1.0.249 / Windows XP Professional SP2. Happy trying!
(tips via emptyspace)
June 3rd, 2007 at 11:40 pm
cool! i have wait for this thing since 2005..haha
July 26th, 2007 at 11:03 am
U ROCK.
With the issues with trillian that I have been having, this is a lifesaver.
Thank u very much
July 31st, 2007 at 8:21 am
i just love this…i have been looking for this for a long time and now i finally got it.thanks guys.
August 5th, 2007 at 1:42 pm
I have no clue how you make another account to go with the one I have. I am very confused. Sheryl
August 18th, 2007 at 12:08 pm
i click on the link but it sends me straight to a different webpage i really want this what do i have to click on to get it
August 18th, 2007 at 3:29 pm
Click on the link below, download and run the file, and then restart your computer.
Registry Tweak
August 22nd, 2007 at 1:20 am
ya i want to open more than one yahoo messenger at a time.
August 24th, 2007 at 11:36 pm
thanks for the file..ur a god
August 31st, 2007 at 5:57 am
Good one..really It worked.. thanks a lot.
Tx,Malli
September 6th, 2007 at 8:58 am
WOW!!! its amazing… Thanks very much Fuad n it really works well…
September 11th, 2007 at 6:19 am
Amazing !! I have been looking all over for this one… Thanks !!! One Question ? Is there a way to send multiple windows to a contact when online ?? would really appreciate……
September 16th, 2007 at 1:02 pm
is there a new multi gold with yahoo messenger
November 20th, 2007 at 6:51 pm
I need a program which I can open 2 0r 3 yahoo messenger in one time
December 2nd, 2007 at 11:43 am
I instal this and I open 2 messengers at once, but I have one big problem. I can’t open my e-mail directly from my messenger. Before I made this change I was opening my e-mail from my messenger without anny problems. How can I solved this problem?
April 12th, 2008 at 3:42 pm
WoW!! why cant everything be this damn easy lol. Awesome! Thanx!!
August 4th, 2008 at 8:20 am
wooooooooooooooooooooooooow so good n nice
August 6th, 2008 at 11:36 am
It works perfect, Thanks
November 7th, 2008 at 1:28 pm
thnx i need it
November 11th, 2008 at 8:06 am
really its gr8888….so many messengers at a time,,,,
u may also download it frm registry tweak
February 26th, 2009 at 11:42 pm
no need to download anything simple steps below:
Go to START->RUN-> Type ‘regedit’ and press ENTER.
Then navigate to ‘HKEY_CURRENT_USER\Software\Yahoo\Pager\Test’
Now in the right pane right click New->DOWRD Value. Name it as ‘Plural’.
Now Double click the the Plural DWORD you created & set the value to 1
March 18th, 2009 at 1:04 pm
can open more than one yahoo
March 18th, 2009 at 1:05 pm
i need to open more than one yahoo
March 23rd, 2009 at 3:25 pm
I have my fingers crossed.. I had two IMs until I upgraded TO VERSION 9.0.0.2152 SO I BIT THE BULLET AND downloaded registry tweak (above) and installed IM twice.. So far seems fine. HOORAY…
April 12th, 2009 at 12:30 pm
thanks for it
May 15th, 2009 at 6:30 am
so now, we can use 2 YM account at the same time in one computer.. and..I just want to ask anybody… CAN WE USE ONE ACCOUNT IN TWO DIFFERENT LOCATION? it means..i just open one account in my house… but, I want to open the same account at the office..but, I dont want the first account to be log out.
can somebody help me?..
June 11th, 2009 at 1:02 am
No Romeo, this is not possible.
November 7th, 2009 at 10:09 am
Okay, if you wonder how to run two yahoo messenger, ie using yahoo messenger with multiple login or id here is the way to do it:
First… Click Start — Run — type in ‘Regedit’ — click Open. A new window will open. Browse ‘HKEY_CURRENT_USER’.
Then .. click ‘Software’ … click ‘Yahoo’ .. then click ‘pager’ ..
And lastly click ‘TEST’
Now you can see an icon ab with the name ‘default’ on the right column.
Right click on that screen ..
Click NEW – ‘DWORD value’ and name it as ‘PLURAL’.
Then .. double click on ‘PLURAL’ and modify it ..
Change the ‘Value data’ from 0 to 1. Click OK to close and it.
Now you can open as many yahoo messenger in your PC or computer.
good luck trying!
December 6th, 2009 at 3:40 pm
Follow the following procedure
RUN>REGEDIT>OK>HKEY_CURRENT_USER>yahoo>pager>test now in right side make a new line using DWORD and rename it as plural and now enter the number 1 and enjoy it
If any body have any problem then send me message at uniqueinstitutes@yahoo.in
January 5th, 2010 at 11:17 am
I have messenger 10 and within the new Yahoo web mail you can log in to chat. At that time I am immediately kicked out of the messenger 10.
Why?
And messenger 10 is the ONLY way I can be working in other programs with it closed and get notified of new messages. This discontinuity is a pain and very frustrating.
Isnt Yahoo…Yahoo??
Please help.
January 8th, 2010 at 4:01 pm
This is what I have been waiting for and it worked perfectly. Running Windows XP. I downloaded, unzipped, ran, and restarted. Then once back on, I just clicked the desktop icon two different times and was able to sign in each one with a different yahoo messenger ID.
Thanks!