I am a college student (screenwriting). I bought a vintage 540c on ebay my idea was to get something I could do some wordprocessing on and maybe check some email nothing major the only problem is I have never owned an apple product nor am I that computer savvy I need a little advce on how I can get the OS upgrade with out a cd rom is it possible to use an external cd rom? I dont have lots of money but I need to figure this out can anyone help The current operating system is (and this sucks) 7.5.5