Please excuse the following pedantry:

"pavor" in Latin is a noun, not a verb. If you want to say "don't panic" you either need some form of the verb pavere (or pavescere, which is to begin to be afraid rather than to carry on being afraid) or to use some circumlocution along the lines of "panic, go away!". There's a discussion at http://latindiscussion.com/forum/latin/dont-panic-or-cease-t... with a number of decent suggestions.

Just out of curiosity, (1) why transliterate into Greek? and (2) is the extra "h" in zhaphod just because someone else registered zaphod 7 years ago and then hardly used it?