There is a search capability within the Gallery that will let you Search on Picture Name, Owner or "Key Words" that have been put with the picture when it was uploaded.
Unfortunately, the random pics on the home page will indeed change with every refresh.
If its a big issue, try this little tip..
If you are working off the home page, instead of clicking on a thread link to view it....point to it and right-click, then choose "Open in a New Window".
That will spawn a new browser window... read the thread, then, when done, "X" out of the window...and back to the unchanged home page that is still in the first browser window.
More work, but the pictures won't change.
