I am about to start work as a real estate agent. The MLS is searched through a website called mlxchange (www.mlxchange.com). However, this site works only with Internet Explorer on a PC. I have PowerBook G4 that is about a year and a half old. I have 256MB of RAM. I am considering purchasing another 256MB of RAM and buying Virtual PC so that I can access MLXchange. Will things run smoothly and quickly enough to be used extensively on a daily basis? Any advice or experiences are appreciated. Thanks.