[larrinski]

So it is a bit of a time wasting... but I want to change my user name(full name and short name).

I could create a new user and move data but I have a lot of music, iphoto, movies etc... I worry about permissions if I transfer the files through the Public folder. Or will there be problems if I switch user names.

[Cold Warrior]

I'd just switch.

[Chuckit]

If you're set on changing your short name, it's probably easier just to do that. Use a program like ChangeShortName. I've done it many times (by hand, even), and while it's annoying if you mess it up, it takes a lot less time than switching users if you do it right.