A great little FREE program you can use on any Windows operating system is IRFANVIEW.EXE. You can d/l from Cnet or most any download site or from their own (irfanview.com). It gives several methods to resize, but for thumbnail pics I've found that you can use the 'percent' and change it from 100% to 15 - 20% for thumbs - just change one number and they both change. You can crop your pics, and the 'adjust color' works wonders on dim lit pics, plus hit every one with the 'sharpen' tool. You can import from a scanner also. It's free and non-cripple and non-time bombed.