User info says 4.1 jb, is that accurate OP? You'll need to be on 4.2.1 or higher to have animated boot logos as that was when it was first introduced. You'll find that Greenpois0n is probably the easiest method of jailbreak on 4.2.1 that will also get you the animated boot logo.
I think you can ssh in to do it but I'm not 100% sure if it it works on 4.1. It does require some ssh and stuff but I'm thinking it needs 4.2.1 and up. I'm iffy. I just think it would be easier just to go to 4.2.1 anyway to do it with a jb tool.