Newbie Q's

Howdy, I have some beginner questions about LP.

1. Can I change the rubout character?

2. I have a shared library warning. Is source available?

ld.so.1: /usr/home/shaw/larch/larchp: warning: /usr/4lib/libc.so.1.8 has older revision than expected 9
3. I can't get right arrow to work when entering equations. If I use "->",
   I get the message that the equation needs to be Bool-valued, if I use
   "-->", I get an undeclared 2-ary op.

4. Is the html in the distribution the most current documentation? I'm also
   using that DEC report #82...