On my Windows XP laptop I normally use Windows Photo Viewer to view images. On Windows 7 the program is crap cause it doesn't animate GIF images so I'm looking for a better program for that.
View order based on a sort order - one problem I had with Windows Photo Viewer was that even if I set the order order to be Type or Modified Date in explorer, when I go though the images they are still in alphabetical order. I recently downloaded a gallery of images who's names are in a different order to how I downloaded them (Horo.jpg, Horo1.jpg, 10122003-6.jpg, bg01.jpg) and I would like to view them in the order I downloaded them at (created or modified date, I can't remember which is changed when you download from the net) so one thing I want to have is the ability to view the images not just in alphabetical order but also a different sort order say by date, type or size.
GIF animations - one of the reasons why Windows Photo Viewer is no longer useful to me is that GIF images don't animate, obviously a replacement program should do this.
Windows 7 compatible - this program is obviously for Windows 7.
Offline installation - my Windows 7 computer doesn't connect to the internet, as such I need to be able to install the program without a net connection.
32/64 bit indifferent - some programs (like iTunes) won't install a 32-bit version on a 64-bit OS, my Windows 7 is 64-bit however I can't guarantee that'll be like that when I get a new computer so would rather have a single installer which I can use on either 32-bit or 64-bit systems.
Price - I'd rather get it for free but if it's very good I'd be willing to pay for it.
Left/Right key scrolling - In Windows Photo Viewer I would use the left and right keys to scroll though images, I'd like to have this functionality in the replacement program as well.