Problems concerning openGL on my game

first of all im a DOD (day of defeat: an Half-Life modification)
acculy i tried to upgrade my openGL on that game cuz it was runing but not that well…
then when i installed the upgrade called
then nothin.
it wouldnt even play the game,
so i did like they told me and took it off as soon as i saw my 3d vid card wasnt ok with it.
now that i have took off the glsetup my game still wont work.
and now im desesperate
can somebody tell me wich patch or update i should use,
cuz im not really good with that openGL thing, this is all new to me
thanks alot!