Right...
No problems
Goto your Admin Control Panel...
Scroll down (on the left sidebar) untill you see the heading :
"User Groups"
Click on "Modify", and a list of all the groups should appear...
In the bottom left of your internet browser (presuming you use windows), a link will appear...Hover of the [edit] button of the usergroup id you wish to find, and a link will appear in the bottom left of the screen. The last digit on the end, say "8" for instance, is the usergroup id...
Hope that helps...
Satan