If they are all in the Camera Roll, plug your phone in and run 'Image Capture' it will download all of your photos to your hard drive in a .jpg format and then you can import them into iPhoto of however you would like.

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Jeff
Current:
'07 Jeep Wrangler
'06 BMW X5 3.0i

Former:
'12 WRX; '08 WRX; '06 BMW X5 4.8is Dinan S1; '02 BMW 530i Dinan S2