I had to go and find the originals or take all new pics which is taking me a long time. I mostly took new pics which was good in one way as I bought a u beaut camera and now images are crisp and clearer. But the downside is I had to wait or still have  to  wait until that plant flowers again or looks awesome again to recapture its beauty. I also changed the settings on picassa so it doesnt scale down my photos too much. If I use original size, they take ages to upload. The only other way when Im in a hurry and it depends on what your items are I used small images of flowers and collaged them after cropping them in SQUARE CD cover crop..That makes them fit the whole thumbnail space provided by ebay e.g  I suspect this is not allowed as it has a border  but I havent had a problem yet( touch wood). Hope this helps not knowing your product...Lou