Hi Frank,
"traditionally", since Chinese font files are rather huge and didn't fit in the flash, Chinese users used /database/system/PRSPlus/prsp.sh file, to mount their own fonts. Exactly the same prsp.sh-s should also work with 600's.
As far as translation goes, the following file needs to be translated:
http://prs-plus.googlecode.com/hg/fi.../en/assets.xml