Hi Steve
You probably need to have a look at skin1/customer/bottom.tpl
Webmaster mode in admin is a good way to find out what templates are doing what on a page.
Also, have a look at these threads:
A list of things asked a million times
http://forum.x-cart.com/showthread.php?p=242369#post242369
Template Editing Guide for 4.1.x (updated Oct 200
http://forum.x-cart.com/showthread.php?t=21529
Yes, it's for 4.1, so it's not quite the same - there isn't a 4.2 one yet - but the principals are the same, although the templates and their locations will vary. It might just give you some ideas.