Every once in a while, when I hit my FireFox icon, it says a profile is already in use. So, I have to make a new one, or use an existing one. I was just wondering how I can switch profiles. :/

It happens when Firefox isn't closed properly, so just close it through tskmgr.
I don't know how to switch profiles, though.

When that happens, hit ctrl+alt+delete, go to processes, then close all firefox.exe's running.

That should solve your problem.

2 seconds Vij, I win!

mmm
i have that problem alot let me find solution again

http://www.mozilla.org/support/firefox/profile

" 1. Close Firefox completely (select File > Exit from the main menu of Firefox).
2. Select Start > Run... from the Windows Start menu.
3. Enter firefox.exe -profilemanager and press OK.
"

get to it like that

I'll get you next time, unlucky...