[rescue] solaris missing /usr question

[Joshua D. Boyd]

I miss typed something in my vfstab file, so now my disk with /usr on it
is mounting in the wrong place.  So, I have a /oldusr, and a /user, but
no /usr.  Well, this would be fine, except that I can't seem to do
anything without /usr.  All I really need is to be able to edit out one
little e in my vfstab file, but I can't seem to do anything other than
cd and pwd now.  mv, cp, alias, and most importantly vi all seem to be 
dynamically linked so since /usr/lib doesn't exist, they won't work.
Eg.
# /oldusr/bin/cp
cp: Cannot find /usr/lib/ld.so.1

Can anyone offer any suggestions other than reinstalling everything?