Compress to mpeg1 higher resolution than VCD

Hi all,

I have this issue that I need to compress a quicktime movie to mpeg1 for clients who don't have an up to date computer. However, I do not need a VCD, so I'd like to make the resolution bigger than the standard PALVCD 352x288. I tried to do it in Apple Compressor, but I don't see any way as to customise the dimensions. I've also tried in Mpeg Streamclip but I can't seem to find an option to transform it TO mpeg1. With those programs being what I've got, what am I missing?

Greetings