Generating e-reader friendly PDFs with gs/ps2pdf

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Hello everyone,

This post is a bit desperate, for I've tried pretty much everything that I was capable of.
I'm currently trying to get latex to generate PDFs that my e-reader can understand. Displaying isn't a problem actually, but selecting text is.

Take Emacs for example, or OpenOffice, or Microsoft word on Windows (which is the system I usually work with). In every case, the PS or PDF files that these programs generate use spaces to separate words, and hence I'm able to select words one by one on my e-reader (PRS 600).

But latex doesn't, and thus I can't select text properly: the only word boundaries that the e-reader finds are punctuation signs and accents, making the notes feature basically useless.

IIUC, using the PDF A/1-b standard should solve this problem, since it would ensure that every word is "tagged". But I have nothing to test this possibility. I've generated a PDF using the commands suggested in the ps2pdf doc, put I wasn't successful at generating an actually tagged PDF.

Please, could you direct me to something that would solve my problem?
Thanks!

Andrew.