One option is to type "testdisk" from a terminal in Knoppix as root, testdisk supposedly restores lost/damaged partitions. It should be easy to follow, if not, google to get some testdisk pointers. To make an image of the drive you will need a partition of the same or larger size of the Windows partition. If your partition is /dev/hda1 (first partition on ATA drive), and your recovery partition is on another ATA drive's first partition in the slave position, the dd command from a terminal as root from knoppix would be:
dd if=/dev/hda1 of=/dev/hdb1/img.dd conv=notrunc,noerror
This will make a bit stream image with a 512k bite size of the same size of partition, but this may also be a problem if the partition size cannot be identified because of the re-size that was in progress may have left you without a partition. If the partition is 60GB, it would take a least an hour before the command prompt comes back signifying completion.
You may also want to try the command:
Which will bring up a companion to testdisk that recovers data, not sure if e-mails are one of the formats, but worth looking into without executing.