Go to Applications --> Accessories --> Terminal
Then at the terminal type:
uname -a
I get the following information:
Linux hrp2171-desktop
2.6.15-28-686 #1 SMP PREEMPT Thu Feb 1 16:14:07 UTC 2007 i686 GNU/Linux
The bit in bold is what you need to match to the restricted modules when installing. Yours might be different.
Hope this helps.