How To Cut Part Of A Video - Pinnacle Studio Hlp Pls

Hello everyone,
You might consider this question stupid, but been trying to cut away the final part of a video (MPEG2) (captured from VHS with ATI MMC 9.03) with Pinnacle Studio 8 to no avail.
Tried searching the forums - nothing
Tried the supplied help - tutorials - did not get 'em

The problem is that the actual video lasts 1 hour and set the record to last that long, but it didn’t stop so now I have a 1:30min long video with 30 min blank at the end.

If anyone can help me here would be greatly appreciated