[buug] remapping with xmodmap: help me save my carpel tunnel!

[TN]

Hi, I'm new to this list. I'd like to do the following with xmodmap but
somehow can't figure how:
-map the right alt key to shift (so i can use my thumb when reaching for
the _ or + or | characters)
-swap the escape key with the tilde key (I'm a vi user)
I'm on a x386 with a standard ps2 running freebsd 5.3 and xorg, if that
matters. I've already managed to map my capslock key to control, which
has been a life saver.
thanks!
Toshiro, eyefull at eml.cc
-- 
  
  eyefull at eml.cc