hope this helps.. (used upper case not to yell at you, but to differentiate the answers from questions
)
1. How many copies should be uploaded – one or two? ONE
2. Does it have to be a color scan? (I have a colored photo but after I scan, it becomes black & white) - YES, IT SHOULD BE COLOR. IF AFTER SCANNING IT IS BECOMING BLACK AND WHITE, YOU ARE DOING SOMETHING WRONG BECAUSE NO SCANNER DOES THAT. CHECK SCANNER SETTINGS
3. After scanning the passport photo (which I got printed from Walgreens), the photo dimensions are much larger than 35mm x 45mm, though the actual photo before scan is correct size. Also, there is a lot of white space border around the photo due to scan, with the photo just being in center of image. Is it a problem? If yes, How to overcome this? - USE A SIMPLE PHOTO SHOP SOFTWARE (EVEN WINDOWS PICTURE VIEWER WILL WORK) TO FIX THE DIMENSIONS
4. Can it be a TIF file? (since I am able to get much smaller file size with TIF, about 80KB) - TIFF FORMAT WILL DO , BUT I THINK YOU SHOULD GET HELP FROM SOME FRIEND WHO KNOWS PHOTOSHOP , OR TRY TO DO IT YOURSELF.