A few skin problems

[mblb]

First a little background,
I am running VB 3.7.4
A friend who is a admin at my site made all the skins and installed them, She even customised the original default vbulletin skin. She is away at the moment and I'm not sure when she will be back and i am having troubles with the skins.

I ran a optimisation thing which said that the skins are causing a lot of lag time. They are not compressed ect,.. How do i fix this? Will they all need to be done again?

The things that are bugging me the most are, I can not change them all to be child skins of the main parent one, When i do, i loose the style chooser. How can i resolve this?

Also i have upgraded a few times since the skins were done, So how can i find out if they are still compatible with my version of VB?
I think most of them were uploaded and not done through XML.


Thank you.