Hi Dianne,

I was interested in this issue as I recently had a piece of "disappearing" installed software too. Regrettably for your issue it wasnt printer software.

So trying to help somewhat, I did a quick search too and found that the Epson site isnt all that helpful with driver versions to suit your Mac OS version or the PPC platform. I looked on Apple site and found the following thread in Apples Discussion forum:
Apple Forum .There seems to be a few things to investigate and try out reading through these posts. Those by Ali Brown seem to have promise.

On top of this you might want to consider this tool:
Printer Setup Repair - 4.2.3 PE
It seems to have helped a few Epson users. I know I have found it useful in the past as well. As always though, read the info and make your own decisions about using it. Since it is specific to your version of the OS I dont think you can lose by at least giving it a go.

Let us know if there is anything of use or not in this info. If not I'll be happy to put out a query on the MacFixit Forums and see what else I can turn up.

Cheers,

Andrez