It's really quite easy to convert your photographic prints to digital images with an inexpensive scanner. You need a flatbed scanner, one that you can put your prints onto a flat glass. A scanner like those built into some faxes that feeds the print through may damage the print.
A quick look at Amazon.com found a Canon flatbed scanner for under $60. Most of the scanners now can scan at least 2400 dpi (my first scanner was only 300 dpi and cost over $500!). I've found that the detail of most prints is not sufficient to gain anything by scanning above 600 dpi.
It's easy to just scan your prints and save them to your disk, but there's a whole lot more you can do to improve the quality. I'll write more about that later.