Meh. I know somebody else took the job, but I did it anyways.
Note: This edits the "Mario A" (and the others) into "Luigi A". It also changes his graphics to the SMAS Luigi. I didn't do the jump height yet, but I know how to do it.
Edit: Just to humor myself, I changed the message box and castle end messages. Also, I found out for myself that you can't really make Luigi's jump height JUST right in Lemetaal. It's a bit too high for me as well. If you want to change it back, get Lemetaal and raise "Mario"'s jump height settings by one. BE WARNED: I have not changed the title screen, so Luigi will DIE if you stay there to long.
Wow, three revisions in one day. Along with that, a first post.