If you do a restore from the recovery partition (disco light on the top), you'll restore back to whatever is on there. In my case that was 1.9.14 (and then a subsequent OTA brought me back up to 2.0.0c).
A recovery from the recovery partition is a complete overwrite back to whatever is stored on there. If your Touch is a later Touch, it may be a 2.0 firmware.
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