Just one question i want to jailbreak and install blacksn0w to open up my network from orange to 02 but i dont want cydia (no need for it). so my question is do i need to update the openSSH settings so that no viruses will affect me?
You can install it via the blackra1n app itself. I agree, though, that I would use Cydia. I've heard of fewer problems when people install from Cydia (though that could be because people who install from Cydia generally have jailbroken with PwnageTool).