If you are interested in playing PAL games in your NTSC NES front loader, forget about it. It can be modified to do so by disabling 10NES, but is work. The top loader does not have 10NES so any region NES games will play in it fine. There are some PAL exclusive games, so this is worth considering.

Off topic: Where did you come up with the name "Flam"? Just wondering.