Got it working - HOW TO GUIDE - Line Corrections
For ClassiPress 3.1.9
Step 1 - cp_formbuilder() Corrected lines: 20 to 148
Step 2 - cp_edit_ad_formbuilder() Corrected lines: 1225 to 1396
The rest of the steps could be found with no problem.
Would be nice if the guide could always follow the latest stable version.
Cheers RK.