Done (without GUI support)
linemode=<value>
Code:
static const TCHAR *linemode[] = {
_T("none"),
_T("double"), _T("scanlines"), _T("scanlines2p"), _T("scanlines3p"),
_T("double2"), _T("scanlines2"), _T("scanlines2p2"), _T("scanlines2p3"),
_T("double3"), _T("scanlines3"), _T("scanlines3p2"), _T("scanlines3p3"),
0 };
row = none,double,interlaced frames, interlaced frames+
column = normal,non-lace scanlines, non-lace frames, non-lace frames+
(Weird method due to backwards compatibility)