What drive imaging technology are you using? Ghost, Acronis?
I was looking at the specs for the "automotive" drive and I was also looking at the specs for notebook drives.
If the drive can be unlocked, then it can be backed up. If the drive can be replaced, then it may be possible to add mp3's (larg quantities) before you install the new hard drive.
Based on what I have read so far and what I know about computers (which is alot) the bigest factors facing the auto techtronics are power consumption, vibration, and operating temperature (not in any specific order).
I have l