How do I convert this link for a Google Picasa image into a custom domain link?
1)Sign in to Picasa-web-albums, using the google account that owns the album that has the picture you want. (If you are already signed in to Blogger you may not have to log in again.)
2)Find the album that has the picture you want to use
3)Click on the album to open it.
(Note: each album has one picture, usually the first one loaded, set as the cover. Be careful to open the album, and not just work with the album cover, because the URL for it is not the same as the URL for the picture.
4)Click on the picture you want: the photo will open in a "photo" view.
5)Click on "Link to this Photo" in the right-hand bar.
This opens two fields: Link, which has the URL, and Embedded Image which has the HTML to put the photo into a web-page.
6)Copy the contents of the Link field.
in some browsers (eg Firefox, Chrome) you may just be able to right-click on the picture once you're in "photo" view, and choose "copy link location".
If you use a custom domain on your blogger blog, template images in picasa need to have this:
added after each image in the template.
Get a custom link, say on godaddy.com, then forward that link to the image?