oh, okay thanks for the help mate, never knew that was the only way, i'll just have to pop onto ebay, and grab a easycap, is there anything else? like that you don't have to buy off ebay?
You'll have to do some research but basically you need a capture device to directly capture the video output of GT5, as opposed to copying and pasting a file from GT5 to your computer. The gamut runs from the cheap system mentioned above to high end capture devices from Hauppauge, PVR's, DVD recorders, hardwired PC capture cards and systems like the Roxio Capture.
Beware that some are HD and some are not. If you are looking for the best quality HD recording, expect to pay minimum $100. All depends on what you want it for. The quality is determined by the lowest quality wiring used in the hookup and my memory could be off but it goes basically as follows from worst to best.
Composite - old school red/yellow/white - 330i - carrys sound
S-Video - round 7 pin connector - 480i - requires separate cables for sound
Component - 5 cables, red/blue/green/ for video and two others for sound - 1080i
HDMI - 1 cable - 1080p - carries full dolby digital signal as well
Note: You cannot hook up PS3 with HDMI to a capture device as it's encoded. The best you can get is component, so you'll have to make sure whatever device you purchase for high def, has component video inputs or a dongle that allows that. HDMI will not work.
The cheapest, as in free way to do it, is to use your phone camera or a camcorder and record the image from the screen, then download and edit the file. If you have a PVR you can do the same thing. A DVD recorder can do it, but you'll have to record the replay, then download and edit it.
Windows Movie Maker is a free and simple way to get decent video editing but there are tons of programs out there as well, from free to expensive.