Just tested some flyout code on Categories Dressing, and it does work without impeding any other mod styling or function.
Something like this (adjusted to #chcategories):
Code:
#categories ul ul {display: none;}
#categories li:hover {position: relative;}
#categories li:hover>ul {display: block; position:absolute; left:130px; top:0; z-index:100; width:140px;}
#categories ul ul ul {display: none;}
#categories li li:hover>ul {display: block; position:absolute; left:130px; top:0; z-index:200; width:140px;}
#categories ul ul ul ul {display: none;}
#categories li li li:hover>ul {display: block; position:absolute; left:130px; top:0; z-index:300; width:140px;}
We now return you to your regularly scheduled mod... :)