You didn't originally specify keyboard layout and I wasnt' around to ask. That's the way I get an Israeli Hebrew keyboard layout as well
Everything else is pretty well built in: fonts should be there by default, language packs are in the repository for Firefox and Thunderbird, and aspell dictionaries are there as well. You will need to go upstream if you want a Greek language pack for Seamonkey or OpenOffice as we don't have anyone packaging those... yet.
Anyway, glad you got it working. Please add [SOLVED] to the original subject line so those of us who try and help now and again know