Print preview and printer drivers

Hi all, I have a few questions about printing. My machine is loaded
with Windows XP SP2 with all updates, and Office XP SP3 and all updates.
I have about 27 printers installed on my machine thru various methods
(IP connections, thru print servers, etc.).
My first question is how can I tell which drivers are being used to
generate the print preview for a document in Word?

Does it matter what printer is set as my default?

What if I want to compare print previews thru different drivers for
different printers?

Do I need to close Word, select a different printer as my default, then
open Word and print preview the document again?

Also, I am having problems with certain documents cutting off words on
certain printers because the margins in some sections of the document
are outside the printable area. Would updating the print drivers make a
difference, or is this a physical limitation of the printer?

The specific printer models I am using for this are an HP LJ 2100 with a
PCL6 driver, and a Ricoh Africo 2022 with a PCL6 driver. Thanks in advance.