top menu padding

Hi guys
First thanks for the 1.6 update!
I'd like to change the padding for the top menu since I need to use longer names, I thought it was the #topmenu_pad , but I'm probably wrong - could you please let me know where can I find that?
Thanks,
Gabriel

OK, I realize now that the ".hjt-megamenu-menubar-item" from jquery.hjt.megamenu.css needs to be altered, but any change I make here doesn't affect the template - is there a template cache that I need to clean before? or am I wrong again ?

EDIT: I feel like an idiot, I was editing a copy of the "jquery.hjt.megamenu.css" - so I found everything I need inside this file and it works great