boy... oh boy... how do I put this...
These examples you gave me are from services these other photographers use. They are not part of there normal sites.
the first link goes to http://morephotos.com/ if you take off all the extra address stuff. the second link the mainsitedomain address doesnt work.
I have a client who I just finished the site a couple weeks ago that uses Pictage www.pictage.com they absolutely RAVE about this service! It's been a great addition to they're business!
Here is a link to the site I've done that completely intergrates the pictage service to their site. You'll notice that the links on the preview page goes to another site. Where the viewer registers and can then order prints.