12.04 - Is there a way to import my Steam games from Windows 7 to Ubuntu?

I'm running Ubuntu 12.04 alongside Windows 7, and although Steam works just fine on Ubuntu, it says that I need to reinstall my games if I wish to play while on Ubuntu. Rather than download my games again, is there a command where I can transfer my home directory for Steam from Windows to Ubuntu? Is it even necessary (example, will it save me any disk space by doing this or will it just be as intensive as downloading it from scratch)?

Any and all help would be appreciated.