DreamWeaver is a HTML editor. Hes not really moving html objects is he? If he is only changing the colour of the forum, then the ACP css files are all he needs. Certainly doesnt need ftp or cpanel access. If he is asking for those things, he might not have a clue on what hes doing.
Dang, he said he has years of experience with xenforo. So I gave him access. Then later he said he needed access to the other parts I mentioned. So this guy probably doesn't know what he is doing. dang
A few hours? Depends what he is doing i.e. updating the individual style properties or doing it all in extra.css. You are far better off getting someone from here to do things you dont fully understand. Or ask for help and people will help you out. Better off learning lil things like that yourself in the long run.