Extent that Dynamics AX 2009 for Retail R2 - POS can be customized?

I need to know whether is there a way that a Sales quote could be introduced before a Sales order is generated using POS, I mean can the standard AX functionality be introduced or utilized via Dynamics AX 2009 Retail R2 - POS? It seems that only few interfaces (*.dll) are exposed for POS which can be utilized and extended slightly via Visual Studio, but when you want to utilize standard AX functionality, there seem to be no way. Let me know if anyone has clue on it. Has any one tried .Net business connector or AIF with Retail POS. Thanks a lot.

Yes u can do it through the triggers