libpq or ++ or xx with Project Builder help needed

help please,

I have been trying to work with the interface libraries in Apple's Project Builder. 
I have spent the last few weeks pouring over the documentation for both PB 
and Codewarrior. 

My humble and honest opinion is that I would prefer to work with PB. 

First, is there anyone that has this setup working? That is... using the libpq(++
,xx) libraries in Project Builder to create a cocoa or carbon app.

I am able to use the libraries to create non-GUI apps. The obvious next step is 
to utilize the libraries with the cocoa/carbon environment. The docs for PB 
state that it is possible to bring and link against these 'older' c++ libraries 
using objective-C++.

I just can not seem to get it to work. I also don't have enough experience to 
firmly make that decision that it can not work for some technical reason.

Please, I am at an impasse.

Ted