Running version 1669.45.40516... unable to mod?

[RisingEdge]

So.. now i have unpacked the sdcarda6_backup_03_07_2014_23_55_39.bin with unsquashfs and have found the one file in /bin/vtech that is different.

Now i must do the changes in this file and make a new *.bin with mksquashfs and then i can flash it?