Help

when i take video's and pictures with the iphone then sync, it puts the photo's and video's onto my pc, but during the sync it then puts the piccy's i took back on the iphone in the photo library and albums

but leaves my video's on the pc

how do i get them on the iphone but not in the camera roll ???
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TOYS...Sony bravia KDL-40W2000,Sony STR-DG820 Amp, Sony BDP-S350 BD player, Yamaha NSP-110 Speakers,Virgin V+, 16gb white iphone 3gs (iphone Friday) and a Lhasa apso called Bailey