Hello,

How to uninstall the BTB packs, so they won't appear in RSCenter anymore?

Thanks,
Jani

Delete all files in this directory :
RootDirectoryOfTheGame\BTBRS\

Under Windows XP delete this key in the Windows Registry :
HKEY_LOCAL_MACHINE\Software\SCi Games\Richard Burns Rally\RSRBR\PacksBTB
or
HKEY_LOCAL_MACHINE\Software\EIDOS\Richard Burns Rally\RSRBR\PacksBTB

For Windows Vista and 7 make a research with PacksBTB and then delete the key.

I did that earlier and didn't help, hence I'm asking :p As I'm running x64 Win7, the key was under Wow6432Node. I double checked it and the packs are still present even if I reboot the whole comp. Sure I can't run them, but I'd like to get rid of the options to choose the packs so the random function would work properly.

Just to prove I'm doing it correctly: http://i.imgur.com/DpIPV.png

I can't help you, I don't have 7
I think there must be another key elsewhere in the registry. Do a search on PacksBTB throughout the registry.

No luck. I think it's cached somewhere in the program.

No, nothing stored in the program.
RSCenter reads the registry to determine which package is installed.