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blueteen, I think that jermaine does not use MultiMenu module, I may be wrong but maybe not
So, jermaine, if you want to have a horizontal menu just choose any nice looking theme with horizontal menu. This solution has 2 advantages:
-nice looking theme (default is not great),
-horizontal menu.
You can find some themes here:
https://xoops.org.es/decorados/modules/news/index.php
http://themebot.com/gallery/?g2_itemId=22849
http://theme.xoofoo.org/
Tip: the last link contain IMO best themes