Wifiboot is basically dslink but running in dsi mode, to use it you can search for the PC tools used for dslink and its
tutorials, but instead of using dslink you use wofiboot. Also yes, you need a wep or open network, even if IMO, wifiboot isn't that practical to use once you already have unlaunch installed as it's easier to launch stuff from the SD rather than waiting for it to be sent over the network at a slow speed