How do I increase rendering speed on Final Cut Express? How do I increase render speed on FCE? I have several overlaid HD video tracks, and it is SLOW.

EDIT: I am on a MBP 13", 2.3 GHz Intel Core i5, 4GB 1333 MHz DDR3. The render disk is an external USB drive.

EDIT: I found out that FCP has a feature that allow you to only render video to a certain quality (or bit rate...something like that). Does FCE have a feature that does this same thing?

EDIT: Oh, and...if I upgrade to FCE 4, will rendering be faster?

EDIT: I am on FCE 4.
I imagine the USB disk is probably a source of the bottleneck.  Try using a Firewire 800 disk.