That skin could be done in about an hour tops.

So how much do you charge per hour to develop custom skins ?

*cough* designing ALL original icons, buttons and coding the mouseover buttons up top??
I think not..

Ok, custom graphocs will require you to make your own, or pay someone to make them (prices vary from artist to artist).

However, you can do the color template yourself from the Admin CP.
Go to Styles & Templates, then select All Style Options from teh drop menu for tyhe default style...

Actually, scratch that. Create a second style. That way, if it bombs, you can go to the Default style while to make changes. (safety first!)