VirtualVCR scheduler
 

I always wanted to do scheduled captures with VirtualVCR but using the Windows Task Scheduler for that as the author suggests is terrible... One mistake and your capture is gone. :D
So this guy made this great scheduler, that can even shutdown when finish capturing. Check here:
http://www.zisoft.de/video/

I already used that one and its also capable to do sheduled capturings if an external Video-Signal will be brought to the card! Means if u use a sVHS as Tunerdevice.

Zisoft is a cool guy from doom9.de/gleitz and as I remember (not shure) he also wrote a Guide for VirtualVCR.