After conversion to ProRes, when you drag the first file onto the Timeline, FCP should ask if you want it to set the timeline settings to match your clip. Answer yes. Workflows for YouTube, Vimeo, etc. have been discussed many times. Same for DVDs. Search and you’ll find your answers. Also check the FCP FAQ which also has a lot of info. You can always output SD from HD. Search for that, too. It’s all there.
John
MacPro 8-core 2.8GHz 8 GB RAM OS 10.5.8 QT7.6.4 Kona 3 Dual Cinema 23 ATI Radeon HD 3870, 24″ TV-Logic Monitor, ATTO ExpressSAS R380 RAID Adapter, PDE enclosure with 8-drive 6TB RAID 5
FCS 3 (FCP 7.0.2, Motion 4.0.2, Comp 3.5.2, DVDSP 4.2.2, Color 1.5.2)
Pro Tools HD w SYNC IO & 192 Digital I/O, Yamaha DM1000, Millennia Media HV-3C, Neumann U87, Schoeps Mk41 mics, Genelec Monitors, PrimaLT ISDN