» Wed Jan 23, 2013 4:40 am
If I understand correctly, the above posted tutorial will do exactly what you need. It's for Draugr, but skeletons should work pretty much the same. Some skeletons are marked with a NoReanimate keyword, so you may have to find ones that aren't. Edit: It's actually the skeleton race that is marked with NoReanimate keyword, which will not allow them to be reanimated through normal means.
Modifying the entire race is probably a bad idea, so you could try to create your own race by duplicating the original skeleton race, or using Draugr instead.