Transfer data to Pricerunner & kelkoo & ...

Hi every one
I'v been working on an E-commerce website for months which is almost done now. (with PHP)
But I'v seen other E-commerce websites have the ability to send product informations to comparison websites like Pricerunner and Kelkoo.
I have no idea how they do it. I will really appreciate if anyone can give me a script to do that or just tell me were to go to learn.

Thanks

re: Transfer data to Pricerunner & kelkoo & ...

I may be wrong but surely you will have to subscribe to these sites.