Another option for manipulating photos is ACDSee from
www.acdsystems.com. You can do just about anything to a photo with the program, including resizing, color adustments, change to black & white, etc and I believe it still only costs $40-50 (a heck of a lot cheaper than Photoshop). The program also allows extremely fast access to and viewing of photos when you have a large number of them in one folder. They also have a free version that you can use for 30 days to try it out.