Questions about PC-Scheme

[David Sudbeck <beowulf!sudbeck@sdcsvax.ucsd.edu>]

Can any in the Scheme community answer a few questions about PC-Scheme
for me?

1) Is there a command in the EDWIN editor to do global replaces of
text?

2) How do you use the UNBIND call?  It is a procedure but I can't find it
in the documentation?

3) Is it true there is a 4.0 version of PC-SCHEME bundled with another of
TI's products?  What are the differences with this version from the usual
3.03 version?

4) Is there a library of Common-Lisp macros (making PC-SCHEME look like
Common Lisp) available for ftp?

Thanks for any help.

Dave Sudbeck