concise oxford dictionary: with which ebook file?

Archived from groups: comp.sys.palmtops.pilot (More info?)

Found that the concise oxford english dictionary was released for
the palm BUT there are 2 versions/complies(?) of ebook for 2
different readers: DEPReader & Mobile Pocket (I think).

The question is which reader is the "better" reader as well as
which reader has more ebooks available.

Of course, gmpsoft (depr) has the dictionary as a download trial basis
which I've installed onto "fast" sd memory 60x. The Mobile Pocket
version doesn't appear to be trialable & its reader must be purchased
as well.

I also have a simpleton's question regarding my palm m125 which I
purchased this week & that is whether I can just add files to the
256 meg sd memory or would I also need to make subdirectories because
of a limit on how many files can be in the "main directory".