You could try put it in a DIV and make the div's position absolute.
But as I was just working on that can cause issues with FF / Chrome.
So you can put an IF statement in such as :
<!--[if IE]>
<style>
.content{
position: absolute;
}
</style>
<![endif]-->
I just used that myself to make sure my content frame sat still. Although for your purposes you may need to incorporate telling the text not to wrap etc.
Gdluck
EDIT You could even just set a min width to your DIV ID? That would probably work just as well but then again if does cause issues with compatibility use an IF function.
Also see http://en.wikipedia.org/wiki/Internet_Explorer_box_model_bug Shows variations on how the box model from IE compares to the W3C standard + other info (If your curious as to why the problem you have is happening)