I finished my Opal scheme for Programmer's Notepad 2 so here it is: opal_pn2.scheme. Since PN2 is based on Scintilla you will need a version of SciLexer.dll containing the "opal" lexer. This lexer is included in Scintilla 1.68 and later. The latest DLL can be found in wscite???.zip from here.