How to enter boot menu without command key? My Macbook air has a keyboard issue, the Z key does not work except upon startup where it becomes stuck for several seconds.

This interferes with opening the boot menu on startup, because it detects the combination of Command + Z instead of just Command, so I can never enter the boot menu.

How do I get into the boot menu with my faulty keyboard?

EDIT: I have tried an external keyboard but the system still recognizes the faulty internal one.
You could try installing rEFIt, which will give you a boot menu every time you boot up.

http://refit.sourceforge.net