I dont have enough free memory to run PhotoShop CS. I'm looking into external drives to free up space. I would also like to upgrade OS so I can watch netflix, and maybe would help with streaming video in general. If I upgrade, not sure what to upgrade to as I want to still be able to use PS CS, office X.1, amd maybe dreamweaver MX (less important) since I already have have these and there would be no cost. Any suggestions are much, much appreciated. I don't know many tech terms beyond CPU, HD, Platform, etc. I am not very technical.I did upgrade the CPU myself thanks to youttube but not sure what the speed is now. All I know is I upgraded to the "maximum".
Thank You for any help! Hard to type with the delay on this page, forgive typos!

Apple Menu>About This Mac, it will tell you your CPU speed, RAM size, and Mac OS version. If you select your hard drive on the desktop and press Command-I, it will say the hard drive size and free space. Can you post these five numbers? – CajunLuke Apr 5 '11 at 20:16