Can I combine HDV and SD?
 

I´m planning to shoot and edit (in FCP) an documentary in HDV (25F PAL) and then convert it to SD in compressor. The thing is that I want to include some material that is shoot in SD from some old MiniDV-tapes. Is it possible to include the material in my HDV project (which I would prefer) or do I have to downconvert the HDV-material to SD before I edit?