If you have a Geforce card and win XP here’s the solution to the opengl problem with games running on Q3 engines…
1.go to you WINDOWS\system32 directory and find opengl32.dll…
2.copy it , go to the game directory (mine’s mohaa) paste it … overwrite the other file
3. happy gaming
I have a Geforce 4 440 MX and it worked for me…