HOW TO CHANGE THE DEFAULT CHARACTER

[zetpap]

I WORK IN PHOTOSHOP 6.0 AND I ALWAYS TYPE IN GREEK. APPART FROM THE FACT THAT PHOTOSHOP DOESN'T RECOGNIZE ANY GREEK PUNCTUATION, IT ALWAYS RESETS THE DEFAULT CHARACTER WHEN I TRY TO WRITE IN GREEK (I.E. SAY I'M TRYING TO WRITE A PHRASE USING AVANT GREEK FONT, WHEN I TYPE IT ALWAYS RESETS TO TIMES NEW ROMAN). THE PROGRAM DOESN'T ACCEPT GREEK CHARACTERS WHEN I TRY TO NAME LAYERS EITHER.
CAN SOMEBODY HELP ME PLEASE? NOTE THAT I'M USING SUITCASE
THX