they are probably all legal in basic too, well except local adjustments like red eye reduction and such.
No, you wouldn't be allowed to use a vignette, or Lomo-ish or Holga-ish (which both include a vignette). Also you might be in trouble with the stretch/distort clause if you used straighten.
oh, i thought Picasa was basic editing software, i didn't realize it could do advanced editing.
it's more advanced than you think, oh yes Kelli was right about the focal zoom as well, Picasa was the first editing programme I used years and years ago when I first started getting into photography, I love their cloning tool works better than the one on elements sometimes.