maxima mode keybinding complaint



I've just started using the new maxima and maxima-mode stuff on
XEmacs.  This is good stuff.

However, I have one complaint.  I use C-M-b, which is normally bound
to backward-sexp, all the time to move backwards to the first paren.
It's quite annoying to me that maxima-mode rebinds this to send the
function to the maxima process.  Same complaint for C-M-f.

Any chance in changing this?  I could do it myself, but I don't like
to change the keybindings of other peoples packages.

Ray