Tutorial for Converting Maxis and Custom Meshes to Various Body Shapes

[chepetico]

I wanted to know if there is a good tutorial for converting Maxis and custom clothing meshes to various body shapes. As an example, I have a good custom Klingon mesh that I would like to convert to Slim BB and Athletic Girl. It seems more appropriate than a Maxis sized sim. I also have some Sci-Fi meshes I would like to convert to CP, Rio, etc. I want to do this for private use only and do not intend on posting the altered meshes. I've been searching through the tutorials and can't find one that addresses these conversation. Does anyone know the tutorials I would need with links to them.

Thanks!