Hi

I'm not an expert on the 'film flicker' look but I believe the way old films flicker was due to the fact that some frames were missing from the final printed roll when strips of film were cut and stuck together in a rough and ready fashion. Or you could insert a black graphic (720 x 576 made up in photoshop or whatever image editor you have) into some of the gaps rather than using the strobe effect (takes forever though).

__________________
All done without the aid of a safety net...