I'll try, it is a 2 hand job
A tripod and camera with a timer could help with that problem, ...or you could get someone else to take the pictures for you.
If you are really worried though about dropping the bolts in your door you could try this little trick I use ~ just sellotape the bolt/screw to your driver so it can't fall off but once it's tightened up to the handle you'll easily be able to pull the tape off.