2012 plate Octavia vrs multiple questions?

hi, i have placed an order for a new octavia vrs awaiting collection on september 1st :-), however im looking a changing a few things before i drive away, i have ordered a front splitter anyone put one of these on and how did you fit it? also front grill in black badgeless how easy is this to fit? a rear diffuser anyone fitted one and how did you do it also the cover for rear spoiler, i am also going to change the alloy wheels but i only really want to but the rims not tyres so could anyone tell me the make,size that is fiited to the vrs from new???? your help would be most appreciated.