all 3 abfs I have linked to are using the separate tensioner setup, i just made a typo in the post. doh.
I was only pointing out there is an easier & cheaper way. It was you that was doubting me, so I had to mess about to proove i wasnt talking rubbish. As I said
I'm pretty certain all abfs have the seperate tensioner, not 100% positive.
A waterpump pulley on its own from the scrappy is cheaper than a complete alternator setup, which you would still need the waterpump pulley with by the way.
If you want you could get it new from vag, not that expensive either:
028 121 031 K - 11.29+VAT
I'm pretty certain the early setup never ran the PAS pump off the same ribbed belt either. Non of the setups I have seen do.
but I'm not 100% sure that it has never happened.

edit: i seem to remember danny saying about modifying it to run off the ribbed belt, this would be pretty handy as then we can bin the v belts altogether...
edit2: oh and just to add, given the choice between the 2 setups I'd go for the spring loaded type as no tensioner to fail and gives a bit more clearance.