1200 dpi would be enuf surly???? thats almost photo quality.
if you wouldnt mind i would have a copy on cd of the 1200dpi ones, i personally am not gonna notice that once behind the glass on my dash.
i can paypal you whatever you want for cd and your troubles, postage should be about 65p on a cd.
if you scan it at 2400dpi you will struggle to fit them on a DVD !!!!!
let me know