to put a vrs bumper on my estate do i need anything else? for example i have all new bumper trims & fogs, but will i need new wheel arch trims ect??

probably best to copy this thread into the fabia one section. you will get a lot more replies but this has been done before as well so somebody will answer your question nice and quickly!

I'm sure you've worked this out, but the rears won't fit!

For the front, just a straight swap - but see this thread, which should prove useful:

http://briskoda.net/forums/topic/201517-new-bumper-brackets/page__p__2589972__hl__tas__fromsearch__1#entry2589972