you need to place detail_size = ; in like main()

also be sure the 2 textures are differnt enough visualy to be noticable

um only other thing I can think of is after you have your skin loaded, seelct that skin in the skin manager and make sure you hit the 'SET skin' button ( do for both skins)

and make sure the 1st skin is not mipmapped. ( it sets it mipmapped by defualt)