Hi Adam,
Thanks for that. I think i'll probably just get hold of an external hard drive and try writing the uncompressed .avi files to that. I think i might be looking at nearly 60GB per hour though!
I just hope that a USB connection will be fast enough to write to the hard drive at that speed!
Also, i tried a couple of the other compressors, just on the off chance that they might not demand so much processing power. It seems that 'Microsoft Video ' and 'Microsoft RLE' work fine at 15fps. the image quality is copromised quite a bit though.
Thanks again for all your help. I'll no doubt be in touch again with other problems.
Cheers
Bruce