Any video on the HDD can be HS dubbed if its size will fit a std DVD. See my link above, "Info on HS dubbing" for a detailed explanation.
Just a suggestion: it might be better to ask questions in one of the two established threads for the 3575 so everyone will benefit and be able to help. There's a "Sticky" at the top of the thread list, and the original thread in the normal thread list?
