I just want to add a brief note about JPEGs and PSP.
In PSP6 there is an item on the FILE menu called EXPORT|JPEG file, which opens a dialog box that allows you easily change the % of compression.
My own trick with JPEG photos from my digital camera is to first use the IMAGE|BLUR|SOFTEN menu item which reduces the blockyness of the "lossy" jpeg format,
Then I save it as a tiff file, because that gives the best non-lossy compression, IMO. And then it is available for manipulation until you are ready to save it as a transparent gif (FILE|EXPORT|Transparent GIF) or a JPEG.
Also, just to add to Hes' excellent advice about PSP:
The bottom layer cannot be moved up, nor can anything be moved under it, to check the transparency. But you CAN select all and then choose LAYERS|DUPLICATE, after which you can "turn off" the bottom layer, and then slip Hes' coloured layer underneath it.
I've been using PSP since version 3 and I find it much more intuitive than Photoshop, though I have 6 different graphics programs on my p00ter including Corel 10. I find that PSP is the one I use the most for Graphics work, though Painter 5 and 6 are still my first choice for fine art/creative stuff.
Hope this adds something helpful to the thread.
~ Jande