Hi Coby and thanks for the reply!
First of all, the croppola.com page won't help this issue but it's a mighty handy tool so thanks for that link!
Second, I got GIMP (I like free!) and was able to change the aspect there which is cool; best of a bad situation is what it is and I can simulate the 16:10 original.
I think the lesson learned for me is any images I shoot in SL need to be saved to my computer's disk if I want to keep the rectangular form.
Thanks again! :matte-motes-smile:.