okays today i'm so happy

i just moded my xbox , then i have to flash the modchip , but......... is 10:30 pm and radioshack is close and so is circuit city , i dont have the DB25 Parallel Cable (male->female , and i'm so anxios about flashing it and playing and everything , so... i was thinking about plugging the external programmer to the back of my PC , but is it bad doing this , i mean will it damage my beloved xbox or modchip

, or i have to wait until tomorrow morning HELP!!!!!!!!