Hell yea, if someone can do it solo i would love to see how, unless your an octopus, I don't see how!
I did mine solo. It was a bitch, but with some ingenuity I was able to get it done.
lol, just go off one of the how-to's. The one on pt.net (which used to be posted here but someone deleted it, I had gotten permission from the OP over there) is a great thread!
I know it wont, but I might...lol
it wont hurt anything, mileage wont really matter.
When you have it tuned you should let your tuner know you are putting one in, as it does make a differance.