Could you please advise me on the steps.

An scx is just a dbf with a different extension. You could write a little program to loop through all the scx files in a given folder and replace the class field with the name of your form class and the ClassLoc field with the relative path to the class library. What I mean by this is that is your forms are sitting in a folder called d:\MyApp\Form and your class librairies are siitting in a folder called d:\MyApp\Libs, you want to replace the classLoc field with "..\libs\BaseForm.vcx" (or whatever the class library is called that has your form class).

One note of caution - make sure you zip up all your forms and put them in a safe place before you attempt this or you shout shoot yourself in the foot and not recover from it.