Is it possible to get NTSC saves to work with a PAL game?
If so. How?

if there's a converter, but if not, no

Some game version uses the same data to save but with different name.Just renaming it and the save will work.Other games requires patch for the game so you can load any USA save into any game version(FFX).And the last ones are those that uses both different name and save different data for every version of the game

There is a patch for it floating around the interwebs but it doesn't work for most people (me included). Google it if you wanna give it a go. It's easy to find.