Configuration at runtime..DLC_CONFIG_ACCESS_BADI or DO_CONFIG_DETERM ??

Hi experts!!

What i would like is to change the configuration of the Account Details screen at runtime, based on certain conditions.

I read about DO_CONFIG_DETERMINATION method but i don't understand how to use it since i cannot give Role Configuration Key.

I also read about BADI DLC_CONFIG_ACCESS_BADI where in the exprting parameters i can pass context id, role configuration key etc..I tried it but i get different exceptions at runtime..

Anyone used any of those two successfully?

Any sample code maybe????

Thank you all in advance