Did you know that quicktime can do this with one click??? just use File/Import picture sequence (or something like that, don't knwo for sure, my quicktime is in french) and then choose the first picture of you sequence... pictures have to be in the same folder and sorted by name...
It will even let you choose the frame rate at wich you want to import the pictures...
It will even let you choose the frame rate at wich you want to import the pictures...