Personally I haven't done a ZETEC transplant...yet, however that guide carl has posted should see you right it looks pretty good.
Pretty much anything can be done with enough time, patience and a deep enough wallet I mean look at Christain and Beccy's project thread some of the stuff going on there is amazing and he has already admitted he is in over his head yet still having a go.
Nasa put man on the moon so anything is possible, or did they....