Vertex Modifier Wrapping Problems

I dont usualy model in vertex modifier but for fixing up wrapping and model adjustments I use it allot.
What realy bugs me is that if you have a 512x256 or 1024x512 texture the wrapping acts like a 256x256 or 512x512.
Any way to fix this?
and on UV map what does the top,left,right thing do?
I wish I knew how to install textporter to work in the utilites pannel on 3dsmax.

that isn't an error, the image is just adapted to the unwrap are.

oh and about texporter, i made a tutorial in thehubb.co.uk about how to set texporter and use it.