Presumably you used Acronis *DISK DIRECTOR* to split the hard drive into two partitions?
Do you also have Acronis *TRUE IMAGE*, because that will let you back up your smaller "C" drive to the new "E" partition. You can then restore that backup to your "C" drive. If you keep the Acronis image file created immediately after splitting the drive, you shouldn't need to use the recovery disks in the event of requiring a "reinstall". Having said that, you should keep that particular backup in external media, so that it can still be restored in the event of hard drive failure.