After removing all the obvious and hidden 6mm (I think) Allen screws securing the timing cover, a light tap with a soft mallet, or your fist, should do the trick. All this heat this area and use BMW special tool stuff wasn't required on my recent timing chain gig.
The alternator rotor removal tool is golden and highly recommended. At 5-6 USD, it's worth keeping in your tool box.
For some photos and tips on the chain job, visit my Timing Chain Replacement album in the Photo Gallery section. Might save you some time.
And by the way, it's not a difficult job unless you count pulling the freakin' exhaust system.[smiley=furious3.gif] Watch your nuts! Exhaust headers nuts, that is.
Monte