IE 6 Content Cut Off

[FourPenguins]

I've got a div on my page that used the following css code for vertical alignment:

position:relative;
top:160px;

I find that in IE6, the bottom 160 px of this page are cut off. I have tried setting the overflow in the body and html tags to "visible" to no avail. The only way to make this text visible is to manually set the height of the body tag. However, I need a way to do this dynamically to make the page the appropriate height for the content (there are several similar pages).
I have tried using the expression hack, but can't seem to get an expression to work. If anyone has experience with expressions in css or any other suggestions to fix this, please help.