Most likely it is a DVD decrypted to the hard drive.
In the Video_TS folder are there four files:
- VTS_02_1.VOB
- VTS_02_2.VOB
- VTS_02_3.VOB
- VTS_02_4.VOB
which are 0.99 GB each? or is it a single large VOB file?
If former is the case, I would suggest you to make a lossless copy of WMV8.
http://www.microsoftusernetwork.com/mcored/
If latter is the case: VobEdit 0.6 - VOB editing utility, can split, demux, remux and join VOB files.
Website:
http://mpucoder.kewlhair.com/Derrow/
Cheers,
McoreD