Please can someone help me with saving/deleting photos?

Question

Hi, I know I am not using my iPhone correctly, but I am a busy mother and have been stacking up the photos on Camera Roll.  I now need to delete some, but want to keep some to show friends. I don't have time to trawl the forums looking for the answer so am really hoping someone will take pity on me and answer these simple questions, bearing in mind that I can't get to a computer to sync that often, so i am going to have lots of photos.
1) How do you transfer photos from Camera Roll to an album using the phone?
2) When I sync and photos are downloaded from my camera roll I get a pop up asking if I want to keep or delete the photos on my phone. If I choose Delete, will it delete just the photos in Camera Roll, or in the albums too?
3) I have chosen Keep in the past and now have masses of photos on my camera roll.  Short of using the curved arrow in the top right and selecting each photo individually, is there a way to delete multiple photos all at once on the phone (not on computer)?
4) Why oh why haven't Apple got a 'protect' button for individual photos so that you can keep a few photos in camera roll and delete the rest, like on a digital camera (yes I KNOW this isn't what Camera Roll is for...) It just makes so much sense.
Thanks.

Answer 1

There isn't any "delete all" button for deleting photos on your phone.  The fastest way to delete photos is with your computer, but on the phone you will have to open the Camera Roll in thumbnail view, tap the arrow button on upper right, tap all the photos you want to delete, tap the Delete button.
When you delete photos from the Camera Roll they are also deleted from any albums they may be in.  Albums are like music playlists, they only contain pointers to the photos in Camera Roll to allow you to look at a filtered view of selected photos.  Just as deleting songs from your library will also remove them from any playlist, so too removing photos from Camera Roll removes them from any album.
As for why Apple doesn't have a "protect" button, you could offer that suggestion to Apple here: http://www.apple.com/feedback/iphone.html.