Hi Tina. There are a couple ways to do this that I know of.
The first method would be to write an {if} statement that calls a different style for each different menu. This requires some knowledge of how Smarty tags work, but would be less code in the long run.
The second method would be to create a different copy of menu.tpl and different styles for each different menu style you want (more code, less complicated).
I can walk you through the second method, but the first method will require some help from one of the Smarty gurus around here
Also, if you could put your X-Cart version number in your signature, it will help us help you better. Thanks!