I have been using JP2 (JPEG 2000) as the perfect archiving format for photos and special documents for many years now.
It is odd that it's not more widely supported, because it is LOSSLESS.
Microsoft should have included a previewer for JP2, but there's no point in delving into their incompetence in just about everything.
Irfanview (freeware viewer) supports the viewing of JP2.
I use COREL PhotoPAINT, which has full support for JP2 opening, editing, and saving. I guess the other major graphics packages also have full support, but you're going to pay for them. Still, I love PAINT.net, because it is a wonderful piece of software, and does just about anything one could want. I will give the JP2 plugin a go, for sure.
