Coding for Dummies

I am a 'dummy', in need of an answer to a slightly decent question.
Getting to the point. I'm making a DIV layout, for my Myspace.
Yes, I know, some people like it, some people don't. Not my problem. Lmfao.
My question;
How do you make your DIV appear like it should on all resolutions?
If there are multiple ways, even maybe one possible way, please let me know.
Let me note;
My 'tables' are off. They have been aligned to their appropriate places, by using margin-left, margin-top, etc..

There's really no point in using proper XHTML coding standards (<div> instead of <table>) on a website that's already not XHTML compliant.

MySpace's coding is horrendous to the maximum degree. So as much as I love coding, you're asking us to draw the Mona Lisa in a pile of dog shit you've been saving up in your back yard.