Thats right absalom.
Sorry solsikkehaven but I think that what you want isn't easy
Well only require a bit of time
Like you say, my slimboy tempaltes uses mycssmenu, if you want to have sub-menu's like drop-down ones, must install mycssdropdownmenu of YTW but of course you must redesign them in the css file to take care of the template's look. You know, must modify much core code of the template... but you can do what you want

Tell me something more and I'll try to help.
thanks.