The HC5 will not let you do this as far as I know. Well Vegas and the HC5 will not. Sony kit supposedly only supports TC with DVCAM.
One other thing to be aware of is this. If you put your project to DV tape it'll only be either 4:2:0 or 4:1:1 if you live in PAL or NTSC land respectively. You can do better coming from HDV, how much exactly is another matter.
If you render your project to the Sony YUV 8bit codec and send the file to a post house with the good gear i.e. SDI or component to the SP deck then you MIGHT get a better result. You'll certainly get a better outcome from any graphics you've got in your project.
one other question, in case anybody out there has experienced this other problem.
When I try to print to tape, in HD or SD, the result is a tape with the designated color bars, followed by several seconds of black (so far, so good); but then, nothin'...even though the video appeared to be printing to tape during the printing process? Working with the Sony HDR-HC5 on this one, too.