Add a Slide show with multiple album selection to a page

Create a new page with whatever name you require but avoid punctuation and spaces if you can.
Click within the main area where you want the slide show to appear.
Click on the "Add Gadget" link at bottom right of the page.
When the "Search" page appears, click on the "Add by URL" link.
Replace the "http://" with "http://www.google.com/ig/modules/pwa.xml" (without the quotes).
Click on the "Add" link.
A page headed "Setup your gadget" should appear.
The width and height can be altered but it's advisable to use 320x200, 640x480 or 1024x768 for normal use. (Width 640 and height 480 is most common.)
Enter your user name (for the album) in the "Show album" box.
Your username is the bit before the @ only. (It's also the address used by picasa albums)
Select the "Flip delay" required. (I used 5)
The settings on the "right" part of the Preview box can not be edited.
Click "OK" in bottom right of "setup" box.
This will bring you back to your page.
Click "Publish"
To check that all is OK, click "View Live".