I need a quick/easy way to change default skins in sims 2

[Kitsune Ascendant]

I have simpe.
bodyshop doesn't work. I know why bodyshop doesn't work, and it can't be helped.
I'm working with skins already in .package files if that helps any.
I would prefer not to have to go with changing each individial hidden sim in that neighborhood.

any help/tips would be apreciated, though a full solution would be apreciated the most.