hi i'm making a slide show and i can't get the pictures to go quick enough in some parts....in the little preview box in the timeline window it seems to go quick enough but when i do a preview at full screen it seems to only switch every second......i'm trying for half a second or less......my computer should handle it 2.4 with hyper threading..512mb ram with a ATI 9800 pro....is the picture size a factor in this? they are roughly 3-4mb each please help!