fixed background in IE

Hi everyone, I'm building a my space type of community using Joomla and I finally gotten it to the point where users can change their user bg image, jus like in my space, I have the CSS set to "fixed background" and while it works great in FF, IE ignores it and scrolls the bg anyways. Searching around the web I've come across several fixes, the CSS fix calls for the url of the bG image and that wont work for me being that it would have to address all of my users BG images, i also came across some JS Fix while this one works its not very clean looking it makes the bg image all jumpy. Its there something better that i can use to make a clean fixed bg just like in Fire fox? I've noticed that myspace fixed backgrouds in IE work very nicely, what code are they using?

thanks for the help

jane