Both Slideknit and UVWframe look very promising, gonna try those. @ SpeCter Never really understood what the W is good for. :) But select all and then setting W to zero should always do the trick.
If you are dealing with Volume Textures you will get what the W is for ;). You are right, setting it to zero should always do the trick. But if you don´t know that, this can really be annoying, trust me. I guess 95% of us never even bothered to go into UW or VW.