Rendering HDV to edit in DV
 

I am using Vegas 6

Ok, I've got about 4 x 3 hours of similtaneous footage from four Z1E's in HDV mode that I want to edit. However, as editing with realtime playback in HDV is not really doable at the moment, I am going to render each stream down to DV, and then when the edit is finished, use the replace function to slot the orginall HDV streams back in and render at full resolution. However this has thrown up a few questions:

Should I switch the project settings from 1440 x 1080 back to standard PAL DV Widescreen while editing the reduction? It has struck me that DV and HDV actually have different ratios and I when I switch the project settings and source files, will any pan and scans or crops we have done, positioning of picture or any stabilization effects we have applied in Boris be incorrect and changed, or will they remain relative to the workspace?

Also, has anybody used Boris FX for stabilization as a plugin within Vegas, and is it any good?

Cheers,

Rob