The original poster (that's you, Arnie.d, right?) can almost certainly go back and edit the subject of the original post -- say, to something like "Best way to prepare to crop and resize?" -- if he wanted to...
A whole pile of this sort of info (i.e. pre-resizing, IVTC, pulldown, super-sampling, etc.) is covered in huge amounts of detail with giants in the field (i.e. the people actually writing the filters to do the stuff) on Doom9.org's forum. That's where I got most of my early info, and I've never seen anything better. Not to say people here don't know what they're doing -- they do, for the most part -- but asking here is sorta like asking about the ins and outs of the recording industry on a Grateful Dead bootleg trading forum.