papermoon- Even I think Scanning is the only possible way to do but try to save in JPEG image. I have done exactly the same earlier.
DBN- Regarding your past addresses, I don't know whether it works or not but I believe every time you moved to new address, you might have changed your address in banks (Credit Cards Co.) too right? If so, then try to visit the local branch or call them, see if they could pull all your earlier addresses.
OR, the other way is the Insurance company (Doesn't matter Auto or Health), they usually do have all the history of your previous addresses.
OR, the last option, Relax...start remembering your previous address before moving to the most current address...then start writing what ever you can remember the list of addresses...if you are confused about the exact address....just write something as..for example: near bank of america in california or texas near wall mart etc..., then try to call your earlier rommies to verify or fren who remembers the exact address just for a help!!!
Hope this works for you.
Good Luck!