quick google search led me to this http://radiator-fm.com.ru/radiatorfmuk.htm#radiator read the supported cards and go from there.
It should be in the readme or help file of radiator as well.
Ok... For radio I bought the first pci TV card I saw, it's made by a company called Mercury. The FM works in the Mercury software but Radiator doesn't seem to have it listed.
So... Is there any way to get this working or do I just have to buy another FM card?