Hi, no but I did do a bit of reading up on it., mostly on vauxhall forums..
It is the same engine and manifold as the vectra and saab, in fact I used a manifold advertised for a vectra, it is the same pierburg part number and so identical in every way but £60 cheaper than the same number sold for Alfas.
A few people said it was possible to leave the fuel pump in place, it isnt as one of the pump studs also had to come off.
I did learn that instead of removing the cam belt the pump pulley can be bolted to the back plate so keeping the tension on the belt whilst the pump is removed. I did it this way as I had changed the belt only weeks earlier, I marked the belt against the pulleys just to check it didnt jump but it was fine.
If you are handy with a set of spanners and comfortable doing a timing belt then it is something you could do at home as it is an £800 plus job at a stealer