[Radek]

As far as BG2 is concerned, it's a question whether XP cap remover is cheating.
1. It is: Yes, it is a cheating because it maipulates game files and game logic. Period. The game was created by somebody and we should play it as it was meant by the authors. All editors, viewers, xp cap removers, and so on are cheating.
2. It is not: But hold! XP cap remover is a "mod". There are bags of "mods" all around. Are they all cheating? I don't think so. The "mods" modify the game so that it becomes more (or less) interesting. Is it bad?
Therefore, you are playing a modified game if you install the XP cap remover. The remover removes anger of those people that reach the XP cap limit too soon and feel deceived when they are not rewarded for their effort. This can happen to all solo players and to all players of small parties of heroes. Also, this is the only reason for installing the remover. With a party of six, you will reach the XP limit late in Suldanesellar most probably. Consider whether you can even level up during the rest of the game, therefore, whether it matters that you do not get any XP any more.