My mate steve did it to his bonus' (s) theres a few pics on here look for steve749 ....

the front panel on the mk4 is totally differnt in fact there is no lower front valance on a mk4. To pull the look off you need to cut the mk3 arches up to the top end of the bumper/wing....

My mate whippy has a set off mk3 arches already cut to fit. I dont know if he still has them i shall ask. Unfortunatly for us mk3 boys they are genuine (!) but whippy didnt do them.....

let me know if you want them and i shall ring him tomorrow...