word press theme customization menu to function like this;

standard look horizontial but when products clicked on the drop down will remain verticle and only 4 key catagories will display all at the same time plus a third tier menu will go verticle from there expanding again verticle making a deep site enavigational key feature being tier 1 horizontial tier 2 horizontial only on one click products then tier 3 vertical again tier 4 vertical

Is this possible with the word press environment?

how can I get this done?

also can a header be utilized with flash flashing products?

KB