The problem with the 9.2 is that you need the missing kernel-source I think Mandrake update will download it by now. Otherwise you kan get it on:
ftp://mdk.linux.org.tw/pub/mandrake/...Mandrake/RPMS/
After doing that you need to open a terminal as root. Switch a 5 into a 3 on a line in /etc/inittab 'd:5:initdefault:'.
Then you change in /etc/X11/XF86Config-4 Under 'Section "Device"' - switch 'nv' into 'nvidia'. Reboot (make sure you know vi!! - ':wq' to save and exit, 'i' to insert, 'esc' to end insert). Type './{location}/NVIDIA...run'.
You shouldn't have any probs. Just change back the 5:er in /etc/inittab and it should start normally.
If it woun't work change back the nv aswell.
ps. this is from the back of my head. I know I read a good newbie guide on this forum somewhere. Hope it works for you!