Install of model update from B737NG 800/900 Disk

Hi,I have installed the model update from the PMDG 800/900 disk for the B737 600/700 etc followed the instructions and went into the aircraft folder then B737-600 pressed the run file but then seen you have to copy paste the contents of XX_ADD_TO_AIRCRAFT_CONGIF_FILE.TXT into Aircraft.CFG my problems are as follows1) Don't know what I need to copy and paste? Where do I find the information I need to copy and paste? I have went onto a B737-600 + 737-700 aircraft and noticed the displays are blank pressed the button for the overhead panel and it all disappears. I did uninstall both PMDG aicraft and re-installed them and the b737 600/700 is still blank does anybody have any suggestions on what to do and how to do it.Many ThanksJason Thompson