I'm trying the same thing - I created a custom "Daily Astronomy" block, which displays nasa's daily picture of our cosmos.
Inspired by Blaine's daily dilbert. It's available on
my site.
I use an external page to display the fullsize image astronomy.php, I include lib-common and use COM_siteHeader and footer. But I appear to be logged out on that page, none of my member menu items show up.
I was under the impression, that the only thing I needed to include was lib-common.
So what was your solution zewt?
FlashYourWeb and Your Gallery with the E2 XML Media Player for Gallery2 -
http://www.flashyourweb.com