This is what I have found out so far:
1) Aspire 8091 = Himage 4010 (cosmetic changes to case, identical rear and remote)
2) If you lose video because you have advertently pressed PSCAN, press Source, press Pscan , Press Enter.
You may have to this a few times until you have proper Source.
3) there definitely is the 1 Gig VOB problem outlined in other comments and the DVDShrink solution works , if you want to salvage what has been recorded.

Questions
1)Hss anyone figured out how to use the "Make Compatible" option referred to in the Editing Overview section Paragraph 3, Page 34 of the manual?
2) Has anyone determined what the Picture Mode settings on Page 39 (Smart, SuperSmart, etc.) are all about?