Reset Wifi help

[MacWilder]

My wifi stops connecting with networks and needs to be reset. Suddenly, without warning, it just "spins" but never connection even though it sees the network. This has happened several times but I don't know how to get it going again. A hard reset does the trick, but I'd like to find out how I can reset it without going through that. Is there a registry tweak or a cab I can install or some other parameter I can try? Would it be possible to delete or rename a file or two and then have the system automatically install a replacement when I soft boot? I am running Sprint Lovers ROM, which uses 6.5x and 2.5.