from kol 2.0.9 only one change is necessary to kol.pas to compile with FPC 2.0.0:

procedure LogFileOutput( const filepath, str: String );
var F: HFile;
T:string;

begin
F := FileCreate( filepath, ofOpenWrite or ofOpenAlways );
if F = INVALID_HANDLE_VALUE then Exit;
FileSeek( F, 0, spEnd );
T:=str+#13#10;// intermediate to solve cast problem with FPC
FileWrite( F, Pchar(T)^ , Length(T));
FileClose( F );
end;

You still need to choose PAS_VERSION in delphidef.inc.
I have updated the documentation and the package on my website.