P16PRO40 programmer

[cod4 rapid fire]

I recently purchased this programmer in order to prgram the pic's for modded controllers. i was under the impression that it came with all the necessary hardware, which it didn't. i managed to find a power supply at radio shack, but i'm not sure how to connect with my computer. it has a 25 pin port and the only port that i have like that is for a printer. can anyone give me some help, i greatly appreciate it.