1. I have not found a way to stream live except in the E2 firmwares.
Some media players do not play 4:2:2, and others will jerk or break up on 4:2:2. Find one that works and use it!

2. The only way I know of to get a second tuner in Optibox is to buy a Raptor. I have really enjoyed mine and will continue to do so in the foreseeable future.