iPhoto and Photoshop

Hi there,

This is probably more an iPhoto question, but I hope you can help anyway.

I am fairly new to using Mac and have to get use to the file management system, especially iPhoto.

I can understand, that when importing a raw (.NEF) file into iPhoto it automatically makes a JPEG copy. But some of the photos seems to be in RAW anyway...? In my iPhoto preferences I have changed the edit settings to open in Photoshop instead of iPhotos own editing options. That works fine, my raw images opens correctly. But when I from Photoshop go to open and into iPhoto library, I can only open the JPEG copy. Have you got any idea why?

Also, when going through open in Photoshop, I can change file-type and resolution. What's the purpose of this?

I hope you can help! Thanks a lot!

Anne.