Ive done this to mine in March of this year.. You just need the V5 02J box and diesel cups.. thats it.. Cups I got of the early diesel mk4 box that I got 5th gear from. Basically, I got a V5 box DZL code and can't for the life of me find the diesel box code I used, but they are all online via google easy enough.. I have the code I used on the old box in my workshop, when I did it out will let you know.. Im not happy with my 5th, as I chose the lesser of the 2 popular ones, so even though I have great take of in low gears, I haven't actually gained anything from the normal VR box up top w