Jaykay; That's about all the CPS will do at starter speed. Attached is a diagram of the fuel system. Item #6 is the fuel pressure test port on the fuel rail. Remove the cap and there is a schrader valve underneath. Either have someone watch the gauge when you turn the ignition on or make sure your gauge has the pressure bleed button so pressure is trapped.
http://www.********************************************.com/porsche-parts/hardparts.php?dir=986-97-04§ion=107-05
edit: Conflicting info on that immobilizer fuse, some say engines won't crank if blown. I don't know haven't tested myself, but figure worth checking.