Hi(Bonjour)!
ProRes codecs was introduced with Final Cut Studio 2.
You can't create a ProRes sequence in FCE, but if you've installed the +Apple ProRes QuickTime Decoder 1.0 for Mac+ you will be able to import ProRes footage, but rendering or conversion will be needed.
http://support.apple.com/downloads/AppleProRes_QuickTime_Decoder_1_0_forMac
Michel Boissonneault