:: Mouse-Over Envelope Tutorial ::
Open up the envelope psp file.
You can
colorize this envelope any way you want by going to "colors" "colorize"
I
used a Hue of 0 and Saturation of 105 for a red color to match the tube I will
use.
Make the empty layer your active layer by clicking on it and stick your tube in the envelope.
Then I wanted
the heart to stick out of the envelope so I went to "layers" "duplicate" and
then "layers" "arrange" "bring to top" and used the eraser tool 
and erased everything but her hands
and the heart.... There is probably an easier way of doing this
but....
Ok shut your empty layers off, and make the very bottom layer active by clicking on it, go to "layers" "duplicate" and then "layers" "arrange" "bring to top" and then go to "image" "flip" and here is what you should have.
Use the mover
tool 
to carefully move
this up a little...
Now click on
the glasses for this layer to shut it off for a sec so you can see what you are
doing, but leave this layer active. Use the selection tool 
set for "rounded rectangle" and make a
selection around the envelope like so....
Go to "selections" "invert" and then turn this layer back on by clicking on the glasses again and go to "edit" "clear". Now shut off the four bottom layers and here is what you have...
Deselect, and this will be your closed envelope. Decorate this any way you want by adding a new raster layer, here is mine so far...
Now this is
ready to be saved, click on 
and then click on wizard...
Click next
choose white for your background color and click next
choose the best colors and click next
better image quality and next
finish and name it "envelope-off" or whatever you want....
ok.... Now shut the top layers off and turn the rest on...
Add anything else you might want to this and save this the exact same way as you saved the closed envelope, naming it "envelope-on" or whatever you want...
here are my two gifs
Now you just need to upload your two envelopes to you site and add the mouseover code.