I recently purchased the 5045GDL+ by Lite-On. I have come to understand, both by posts in this forum, and by using the unit myself, that you cannot record a program and at the same time watch another recording, or even a DVD. You can only watch the recording you're making from its beginning. (Funnily enough, a PVR I used to have could playback everything BUT the program that was currently being recorded).
Anyway, my question is: Is there any firmware (official or un-official) that lets you do the afore-mentioned, or is it impossible to fix via firmware?