PRS-600 NEW MEMBER :) + some short simply question

[Kashue]

Hello.
For some time I was thinking to buy the eReader, I read a lot of your posts,and discussed what to select, but I made the decision that this would be the PRS-600, especially mgmueller statement that positively surprised with prs-600, has strengthened me, it will be a good reader for me, and somehow I don't afraid of the glare,becouse my enthusiasm can not be so easy to destroy Then it happened became the owner of prs-600 now only 10 days to delivery.
I began to prepare, then that reader can easily work with, but I have a few questions for a couple of things I'm not sure:

At the beginning I will say that I come from Poland so needs to have Polish fonts and characters, so I started to test the formats for the reader, installed ebook libary 3 from SONY, I see that correctly reads the Polish fonts in pdf files, but only in those ... So I tried CALIBRE to convert my files so that ebook libary started using Polish characters, unfortunately without success ...
Now a question for you ... what are the best format to convert from and to?
to get Polish fonts? Perhaps some additional tips to start with.

edit1:
i have some succes...using book designer. I can make sony file with polish font corectly displayed on ebook libary

and by the way hot hello to All

ps.
My national language is Polish so I apologize for all my mistakes