Do you mean in the EZReader? You just press the 6 key then it will put a number beside each link then just type the number by the link you want to navigate to and press OK.
I just opened a EPUB in ADE the TOC is defiantly different then in Cool Reader.
I'm afraid that MOBI's TOC is just page of links which is alot like CR's but you don't have to use arrow keys to highlight the link you just type in the number of the link.
Sorry I don't use ADE so I didn't know the difference.