I finally manged to find a place to get a 5000 modulator from. I will use the modulator to either output to a Panasonic DST-51 or something similar to it. Will I need the DD module to pass the DD signal to the Panasonic unit, or does it get sent through the modulator? I went out and ordered the modulator without having a 5000 currently because the modulators are a LOT harder to come by.
Yes, the Dolby Digital gets re-modulated. I am having no problems passing Dolby Digital to my decoding receiver from the AC-3 coax output of the HiPix, with the Dish 5000 modulator as input, for both HBO and SHO.