I carry two phones. Nextel i530 for walkie-talkie and free incoming;  
Verizon t730 mostly for travel and roaming.  I use iSync to keep
the t730 contacts up-to-date from my G-5 Mac, and couldn't live without
it.  (To my sorrow, iSync won't work with iden phones)

I need a way to transfer contacts (address book) from EITHER:

t730 (or my Mac G-5 address book) to i530.

I do have a PC available in addition to the Mac.

I don't want to type them in one-by-one.  I have USB data cables for
both phones.  I don't mind buying software, or going through several
steps to accomplish this.

TIA

John