If you dont want dual boot, there are lots of libraries that will allow you ti run linux binaries on windows, but that wont help you cause no hardware suupoort. You may consider running a virtual machien of some kind to achieve what you want.
But all in all, games are heave software to run so a dual-boot should be prefferable.
Edit: You could also grab a copy of a linux distro with a live cd, like ubuntu, that will allow you to test linux running only from CD before deciding what to do

note that running from CD is significalntly slower than running from Harddrive, but at least you can see wshat you are getting into
