is there any cheat software out there for thi and the other forgotten realms games on the pc? (pool of radiance,curse of the asure bonds, ... etc)

Well theres Dale Keeper For IWD. I think the one for Baldures gate is Dark keeper, not to sure about that though. You can always just activate the developer consol in game though it lets you cheat to your hearts content as long as you have the commands which are easy to find just check online to see how to activate them. Just download the last patch for IWD though if you're going to use any of the cheat software or consol or else there may be some problems.
And heres a site with a shite load of mods, Pocket plane, for Infinity engine games.

Dont know about any other forgoten realms trainers but the majority of them (1996-2001) were mostly done by interplay since they had the rights, so most were done on the infinity engine. Neverwinter Nights is a joke to cheat with since all you really need to do is make uber weapon and import the character with them into the main game.

P.S. stay away from Pools of Radience, that game is a disgrace to even look at.

my cheat things won't work it dosent say any thing I don't know why tell me!!!

Slow down, take a deep breath, and please, explain what's wrong, and what cheat system you're talking about.

Gatekeeper (Baldurs Gate I version)? The CLUA Console? Or, if you're using Tutu, is Shadowkeeper* messing up?

*I mention Shadowkeeper because, due to the fact Tutu runs off of the BG II engine, Gatekeeper won't work for it. Needless to say, Shadowkeeper is for BG II.