Are you also saying, if I put Os2007HE on the internal flash, I can still access my files that are on the MMC? Like my text files, or a few music files. (I probably have less than a dozen total files total since I've only had the 770 a short time.) I hadn't thought of that.
sudo gainroot mkdir /home/user/MyDocs/OS2006 mount -t ext2 -o noatime /dev/mmcblk0p2 /home/user/MyDocs/OS2006
sudo gainroot umount /home/user/MyDocs/OS2006
If I like OS2007HE well enough, then I'll move on to the next step of having two linux partitions if I can find some instructions on that.