Ok, so I have this problem too. When I park the car on a slant, I noticed the e-brake can't hold it as the car will start moving slowly forward. However, once I step on the brake it will hold it. This is weird. According to what I've currently witnessed on my car, is the e-brake basically a manual lever that causes the rear disc brakes to engage via a cable rather than hydraulics? Or is it actually a seperate brake? This FREAKED me out today when I was getting out of the car and it started rolling forward! What I did was just engage the transmission into gear, step on the brakes and hope it doesn't continue to move forward. OP, is this the same situation you have or were you just wanting to tighten the e-brake?
(gah)