Loading Bitmaps

I have created a long animation in another program, but it can only save as a .gif or a bitmap sequence. The .gip ruins the colour’s, and the bitmap’s look ok.
So I have imported all of the bitmaps into flash, but the only way I can figure how to get all of the frames onto the flash timeline is to drag and drop each one. And to do this with 1000+ frames, getting them all to line up would be too time consuming.
Is their an easier way?