CSS Guru Needed

I just have a small task of creating a CSS scroll box on the layout that does not break the layout in any browsers. See the attached file for the layout. I have everything else in place. I simply need the CSS code to do this in a scrolling div that will not affect the layout in any way. I have tried working with it, but the layout keeps dropping. The budget for this project is $20. I will not accept anything over this. Thank you for bidding.