You can use Cucusoft Ultimate DVD + Video Converter Suite1 for example. Cucusoft Ultimate DVD Converter can convert the whole DVD or selected titles to many formats including Windows Media .WMV video.

Why do you need to convert to Window Media format? Why not using say h264/MPEG-4 AVC video codec instead?

What are your DVD ripped files for? Will you watch your videos on portable devices Creative Zen Vision, Archos AV, HP iPaq, Pocket PCs?

Do your DVDs have CSS encryption or any other protection?