best option if you aint got (or cant get hold of) a guitar with a pickup is to rig up a mic and record it that way. As Im assuming money IS an object then I could reccomend that you experiment with your PC mic and use some recording software sutch as sound forge or wavelab. If its lacking in EQ you can tweek it with them.
point the mic about 20cm from the mouth of the guitar or keep trying untill you get the best sound. Nothing beats a good quality microphone tho.
OH also heres another suggestion:
Set up your video camera, again, at a reasonably close distance and record your playing from there. Then, if you are editing on pc, capture what you have done then save only the audio then take it for some EQ loving in your nearest friendly audio editing software package 😉
good luck