i have a cinq, and i started by:
1. reversing it up onto ramps
2. drain the tank
3. removed the bottom of the rear seat for ease
4. removed metal panel protecting fuel pump
5. removed the pipes and plugs to the tank (leaving the fuel pump in)
6. then went underneith the car and removed pipes (just held on by clamps easy removed)
7. then i attempted to unbolt it, but all but one bolt snapped (there are two bolts and the rear of the tank either side and two bolts at the front of the tank in the centre, one was holding my exhaust heat sheild)
optional: you can lower/remove your exhaust for ease of removing
(all i did is remove it of its rubbers and lowered it to the floor)
8. remove the tank
If your bolts snapped like mine, you can drill them out and use your own nuts bolts and washers
hope that helps