Originally Posted by MiK546

1. Connect your N900 to your PC in mass storage mode
2. Locate the Quake 2 datafolder in your PC (sorry, I'm writing this from my N900, so you must find it yourself)
3. Copy the pak0.pak file tou yor N900 (just copy them to the first folder that opens when you click N900 in your My Compurer)
4. Move the pak0.pak file to user/.quake2/baseq2 by typing

Code:

mv /home/user/MyDocs/pak0.pak /home/user/quake2/baseq2/pak0.pak

to X Terminal
5. Disconnect yor N900 from PC and now you should be able to play Quake 2!

Hope this helps!
(sorry for the wrong folder I gave first, it was the folder I copyed my pak0.pak-file temporary before moving it to right place(and thanks to CepiPerez whose post made me understand that))