Attention!
The directory tce also contains the backup file mydata.tgz.
Only so in a very particular scenario, not in general.
Same applies for dynamically remastered personal initrd's.
BTW, using same mydata.gz on more than one box works fine for me, only having to adapt hardware related files each time, e.g. ~/.xsession, /etc/asound.state
Moreover, this solution will not work if you have to load special things for the machine (like firmware) via onboot.lst cause this file is also part of the tce-dir. This you will have to subsequently re-edited onboot.lst manually.
I can't understand what you mean, could you elaborate?
I would simply copy the directory tce/optional with a USB stick or network share and then adjust the file onboot.lst
To avoid having to setup network shares, a very simple way would be to run tc-terminal-server, symlink tarfile to be transferred to /netboot/ and then get it by tftp. Or if ssh is set up, scp could be used also.