thanks dm_clown, that worked perfectly.
for any who wants to try it, here's what i did....
-download q3radiant from
http://www.gamers.org/pub/idgames/idstuff/qeradiant/Q3Radiant/Q3Radiant202Setup.zip-extract it from the zip file
-cd into the directory
-run the setup with this command...
wine SETUP.EXE -install it.
-run q3radiant with wine with this command...
wine ~/.wine/drive_c/Program Files/Quake III Arena/Tools/Q3Radiant_202.exe-load the map file that was made with quark. a dialogue box will ask you if you want to convert it back to the standard format, click yes. then once the map has loaded you can save it and it's ready to load into radiant.