|You can use free software available from the maker of one or the other hard drive's web site to copy (clone) the whole 80gb drive to a SATA drive, and you have the option of formatting the entire destination drive's space and adjusting the size of the partition(s) on it. .|
E.g. If one or the other hard drive is a Seagate or Maxtor drive, Seagate has MaxBlast, the latest version of which is a slightly crippled version of Acronis software (you can copy the entire hard drive's data contents but not individual partitions).
Western Digital has similar, also a slightly crippled version of Acronis software