Wes,
I just tried a couple of them and they seem to open fine for me.
If you want to try it, PM me your email address and I will send a couple direct to your email and see if that works for you. If it does, then I can send the rest.
EDIT: I just saw your Pig Plans post and see you have TurboCad. I can also send a DWG or DXF file to you if need be.
Gail in NM