> can I install a Ubuntu 11.04 version of the client OS on the chroot of a
> Ubuntu 12.04 LTSP system? How?
But. Natty is already dead (11.04). So maybe you go with lucid?
Ubuntu 10.04.4 LTS Lucid Lynx April 2013 (Desktop)
And then you have to figure out what next, Debian maybe for old PCs?
Best Regards Asmo Koskinen.