Very Computer

I'm using YDL 2.2 on an iBook-300 for a while, running fine.  One
thing that bothers me is the completely unused Apple/command-key.  I'd
like to use it as a third special key besides Control and Meta to
assign special shortcuts, e.g.:

Command-1..4: switch to workspaces 1..4
Command-W: close window (Meta-W interferes with Emacs sometimes)
Command-T: launch Terminal

I'm running Windowmaker but that could be changed.  If anybody knows
how to do it, I'd be grateful.

Daniel