Moving postgres users accounts from one postgres 7.3 to postgres 8.0

[Najib Abi Fadel <nabifadel@xxxxxxxxx>]

Hi,

i need to move my postgres users with their passwords from one postgres version (7.3) to a newer one (8.1) .
Is there an automatic way to do that without having to recreate the users with their passwords ??

Thanks for any help
Najib.