I already did this tutorial a while ago (but forgot to finish and upload it).
Here's a little overview about the basics how I scan my pictures. There are of course different ways how to scan a picture properly, but this way always worked out nicely for me.
Scanner: Canon CanoScan 4400F
Program: Adobe Photoshop CS3
Artwork: Traditional colored picture (markers, pencils)
Click "Download" in the menu to see the full size picture (I hope the font is still readable).