[seeker372011 (Narayan)]

I have two and a half hours of lights from some time ago that I must throw away because I overexposed the flats (operator error-blame it on tiredness at 2 am after a long day at work or alternatively on stupidity) and now can't get rid of the (horrendous) amount of dust and also vignetting

is there any way that i can save the situation?

thanks
Narayan