Shoutbox

i'm trying to run something with the google app engine, but i can't get the yaml file correct, i am experimenting with the app engine as i plan to try very hard to get, a script out on it which generates skin code, i was going to start it a few months ago but i decided not to with the release of wlm 2009, so i'm just trying out the app engine stuff as it looks like a good solution but i keep getting an error when i try upload my text file i source information from, could someone show me an example of a yaml file with uploading of extra files which aren't part of the script and see if i can find my problem?
TIA