Yep, I had the same problem with PartyOn. I also had trouble getting focus back to PartyOn after launching some programs from it. I solved it was by creating an AutoIt script that restores focus to PartyOn. You'll need to download AutoIt (great, free, simple to use scripting program for windows) at
http://www.hiddensoft.com/AutoIt/ Download the AutoIt script I wrote from the Magma downloads section of my site at
http://www.geocities.com/emu_skeleton/ To use it on startup, launch PartyOn from a batch file along with the script. To use it when launching stuff from PartyOn, launch programs from a batch file with the start /wait option and place the script on the next line of the batch file. Example:
start /wait c:\fido\fido.exe
c:\AutoIt\AutoIt Partyon.aut
When "fido.exe" is done, the batch file will resume and restore focus to PartyOn. The software page on my site may explain this a little better.
This is sort of a clunky way to do it, but it works well for me.