OK, you can just just forget Find/Replace, and add your single call to RM_Logo after the CTRL/I inserted trims, (commenting out the __END__).
Easy Peasy
EDIT: VirtualDubFilterMod here:-
http://forum.doom9.org/showthread.php?t=172021
and description of Script editor here:-
http://forum.doom9.org/showthread.ph...15#post1772115