Had a macbook for nearly a year now and loving it. Just been away on holiday and have 1500 photos in iphoto neatly organized in events. When I try and burn or export them it comes up with "cant find photo" - 'cancel' or 'find photo'. if I 'cancel' it stops and 'find photo' doesn't I cant find any images on the hard drive as they are all stored in one large library file. any help would be great.

I also have another 60GB of photos on an external hard drive do I need to import them all to see them in Iphoto or can I create a second library on the external drive for iphoto to use?