If You could get Your hands on any .psd files for a skin that You like You should be able to do what You want with it. You will also need to get the RRSkin Editor.
I just checked Guinos link for the BMV2/BAV2 psd and it's down.
What exactly are You looking for in a skin? I suggest checking out CDRSkulls MC2.0 It does pretty much anything You would want and is easy to customize. And his psd files are available also.