I did it this way on mine, on a 1.9 tdi, rather than dissemble the transmission and dropping the box, crawling round under the car. Spent 3.5 days doing it but I also serviced everything, did a bit of tinkering, and also fitted a new cat (had to grind off rusted bolts) and intercooler. Lots of learning as it was the first time I'd taken the car apart properly.
If I had to do it again, maybe a day and a half max to do it, now I know how all it all bolts together.
Have a look at my 'Icarus' build thread. Loads of pics there.
I'm in Northampton, so if you're nearby I might be able to lend a hand.....
Rob