1. No redirection, no pop-up, no dialer, no dirty trick. The large picture should not open on an html page. Most of the time, a minimum of 15 picture or 3 movies, the pictures should not be less than 30 - 40k in size (well, they can, but some places will reject you).
2. Most of the time, yes.
3. Make the template for your gallery, insert three recips on the top of it, and repeat. Better buy a soft to help you submit, like advanced submitter, chameleon submitter, mighty submitter...
4. Don't post galleries
just kidding, but nowadays, if you don't have partner account, or pay for it, or pay for gallery spots, you can't expect much.