Yes, you can flash them for PAL console (you can switch the boards from PAL<->NTSC by pressing several time the SELECT button of your console).
I am french, have a PAL FR NES console... I have that NESmaker kit (the flasher from INL and the boards) and I can flash my nesmaker games and play on it
You will have some modification to make to some script in order to have a correct PAL game (for audio speed compatibility) : http://nesmakers.com/viewtopic.php?p=12740#p12740