In trying to insert greek letters into a graphic I found that there appears to be a common problem with the mapping of each of the three WP Greek fonts.
For example, the alphabet in WP Greek Century types as follows (lower then upper case):

In NeoOffice, it looks like this:

ΑΒΨΔΕΦΓΗΙΞΚΛΜΝΟΠ;ΡΣΤΘΩΣΧΥΖ

αβψδεφγηιξκλμνοπ;ρστθωςχυζ

Note that it is necessary to switch from US to Greek keyboard to get the Greek characters when using NeoOffice regardless of the fact that WP Greek Century is the selected font.

This switch is not possible for Inkscape since it is running in X11.

Any thoughts much appreciated! Until then 'alpha' and 'beta' will have to suffice ~

Stu