First you need to make sure the picture files aren't too big, when mine were I couldn't do anything with them. If you don't have photoshop you do this through paint. Open the pic in paint, then select Image from the Menu Bar and then Stretch and Skew, under stretch change the number from100% to 90%. Keep doing this till the file is smaller, I kept mine around 25KB, can take quite a few.
After that re-save them to the card, make sure you remove the big ones. Put the card back in the phone. Go to Pictures and Videos, then My pictures, then External Memory. Select you photos and under Options save them to the phone. Then when you go to screensaver they'll be there to select. If it's not doing anything when you select them they're st... (continues)