Re: Synaptic Package Manager error
You need to boot the CD using the R/W -- aufs option.
It should be available as one of the choices at the CD's grub menu.
On second thought, what Mepis version is this? Looking at the iso sizes here: here
, I don't see any isos weighing in at 635 MB. I think you might be using a very old version of Mepis (before there was a R/W -- aufs option). On older Mepis versions (Mepis 6.x and earlier) you weren't able to use Synaptic or apt-get while running the LiveCD, you could after installing to harddrive. If the version you have is that old I wouldn't install it anyway.