Well, I think you are going to be disapointed if you want flawless WiFi without installing a better rom than the sharp ROM.
The sharp ROM basicaly sucks IMNSHO.
If you want to keep the flavor of the sharp ROM without all the bug and instabilities and incompatabilities, I highly reccomend the latest tkc rom. TKC2.0alpha3 is alph in name only. It is a very stable and capable ROM and my ma701 worked fine until I needed cash and sold it.
Also, OZ, expecialy the newer beta ROM\'s work realy well, though if you have a 5600 beware, there have been many bad reports about these.
With tkc and OZ I never had to do anything but plug the card it. That was it. When connecting to protected networks, the gui netowrking apps that come pre-installed on both of those roms were more than enough to get connected without doing anything hard, and in OZ, I didn\'t even need to click the litle icon to bring up the network, just stick the card in and go.