it's funny, cause dan's having dreams of us actually listening to him for once...
seriously though, if you do want to make your own cables, you need the right tools, or years of your time to screw up with. if you just need one cable, go buy it, over priced, from some electronics store. if you need more than one, then learn how to make them, and try not to waste too much cable / RJ-45 connectors.
and just incase there's any doubt, both me and superdanman are halfway to our CCNA's (Cisco Certified Networking Associate) which means we know way more than we should about computer networking
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