and what did CS:S run like when running on virtualwindoze??
ill switch to Ubuntu completely if you could get it to runproperly
As said previously in this thread, all games will run cack through VirtualBox as it doesn't provide direct access to the hardware. The graphics adapter appears as "VirtualBoX graphics adapter". Whilst being superb at 2D tasks, it falls over at anything remotely 3D intensive.
Your only chances are Wine or Cedega. After having a brief look at both, these links might be of use to you:
http://appdb.winehq.org/appview.php?iAppId=871
http://games.cedega.com/gamesdb/games/view.mhtml?game_id=3524
Note, Wine is free, Cedega is not.
Good luck!