In need of someone familiar with PSPHost

Is it possible to hook up my psp with NetHostfs when my internet set-up is as follows?

DSL -> Router with built-in modem and wifi (westell 327w) -> computers by an ethernet cord

Do I need a card that connects to my modem wirelessly and if so, why would that matter if it is running through wifi?

Also, I can function mytunes RSS feeds from my computer and connect directly to my computer (through wifi from my modem) with portable VNC... if that info is of any help

Any help on this would be much appreciated, the whole concept of using my hard drive as a memory stick sounds quite interesting even if there are limitations to it.