It just takes a few minutes and you are there.
THIS IS STEP ONE
OPEN a picture that you want to start with
(In your picture files on your computer open with Picasa photo viewer
then edit in Picasa
Which brings you to this Screen
On the top bar (CREATE pull down menu to ~~~COLLAGE)
Step Three: Adding you photos to the screen
you do this by clicking the clips tab and get more..
Step 4: you drag the photos you want in, caution if yu are fast it will out them all on so click in a open white spot first then one at a time.
Step 6: You then click the very last on the list in the menus in the box where you see shaded gray