The message refers to your physical RAM. I've added the restriction to save you the burdain of installing the game in the first place, if you have 256mb of RAM or less, since the game will be virtually unplayable(using 300+ mb of virtual ram is no fun... I'm talking about a 10 minute loading time and stuff like that :/ )
If you have 512mb of RAM or more and you still get this error, let me know! That RAM error message is kinda dodgy, people have complained about it before..
