I can help you with the install and configure of the MyPBX, we have rolled out quite a lot of these embedded IPPBX's I just need a little more info so that i can give you an accurate estimate.
are you replacing and existing system, or is this a new install
if you are replacing the current system will you be using the existing analogue phones, or are you going IP.
what model are you deploying, the SOHO or standard ( SOHO 4 analogue ports max, Standard 16 analogue ports max)
are you connecting analogue, ISDN or IP lines to the system
do you want skype integrated into the system as well, to take advantage of the unlimited international calling packages.