For any newbies worrying they're going to screw something up...don't. If you've got a crimp-on laying around great, but if you don't - don't go hunting for one - just do what I did. I'm no hardware guru and it took me like 10 minutes and works like a charm.
Find a old power supply. Cut a HD power connector from it, taking as much wire as you can. Wire cutters are great. But even scissors or a toenail clipper work just as well.
Use a razor blade to carefully strip the insulation off the four wires somewhere along their length. Strip off like maybe a .5" section. Careful not to cut the wires. Just score the insulation around the wire at both ends of the area you're stripping. Shave insulation off carefully until you can pull the insulation by hand and it'll break along the scoring. Try it on a scrap of wire first if you're really worried. If you've got wire strippers, use them to do the scoring (they won't cut the wire - that's the beauty of em).
Take your power plug pigtail (say that 5 times fast) with the ends of each of the four wires stripped (a knife works fine...score around it, and slip off the insulation sleeve to expose like .5").
Match up the colors (blacks are both ground, doesn't matter which). Twist the exposed pigtail wires so the say together, then wrap em around the exposed section of power supply wire.
You can then just give em a good electrical taping, but if you have a soldering iron (even just a $15 el cheapo from ACE or somewhere - hell, those cheap ones even have a little solder in the box) secure each of the wrapped pigtail wires to it's power supply wire with a little dab of solder. That'll make a good connection and hold them permanenttly in place. Consider it a good first excercise in soldering. Then, wrap each wire connection with the electrical tape.
Bingo...whaddaya know it works, it's cheap, it's effortless. And you'll be able to amaze your friends by being able to describe the inside of a wire to them...or be the life of the party with your sodlering exploits. You gotta start somewhere to do this stuff yourself and this is as simple as it can ever possibly get. Give it a try and learn something you'll be able to apply later. Besides all that it's fun.
Forgive me if I'm patronizing anyone...really just wanted to give any timid newcomers a push and let em know it's all right to get your hands dirty.