I typically try to avoid the VZAccess software whenever I can due to the special Venturi software likes to mangle the TCP-IP stack/helpers from time to time. Another blogger has a step by step instructions on avoiding the software.
Basically, under any OS, as long as you can get the PCMCIA cards exposed to the USB layer to provide the USB serial interface, dial #777, use email@example.com for your username, replacing xxxyyyzzzz with your mobile number. Password is always 'vzw'.
You can also 'drop down' your connection speed depending on what init strings you send to the 'modem', unfortunately a lot of those are card specific. One primary use of this is to force 1xRTT mode when you are in a fringe area.