So I'm going to copy a 12.x IOS using the TFTP program Pumpkin, suggested in a thread here:
http://www.techexams.net/forums/viewtopic.php?t=24825. I'm all good until step 10, where I can't get a connection in HyperTerminal. I plugged in a straight-through cable from my PC's 10/100 RJ-45 port to my routers' E0 port, but no connection is established. Do I telnet in, and if so, how? I've already set an IP address of 192.168.1.75/24 on the router's E0 interface and my lone RJ45 port on my PC is in that same subnet statically (192.168.1.69/24).
Thanks for answering this dumb question.

EDIT: Ok, so now I'm trying to load c2500-is-l.122-15.T IOS, but it keeps failing/timing out. Any common problems that usually lead to this sort of error? I created a folder called TFTP on the desktop and made that my root folder in my PumpKIN TFTP program, so that's not a issue I don't think.