Additional file extensions for Pascal syntax.

I woulds like to add the extensions .p01 and .p02 to be recognized as Pascal files. Where can I do that? I have tried to directly add them in the filter line of the Object Pascal section of PSPad.ini, but that does not help, the editor still does not recognize the pascal syntax and highlight it accordingly.

Highlighter settinhgs / Object pascal highlighter
On the second tab - Specification