Yes, in the broad sense, that's correct. Open Theists have many different viewpoints on this, but they essentially see God acting within time (time merely being a sequence) and God and humankind existing in an eternal "present" - the past is gone and the future is yet to be.
Yes. There are some different views here, but essentially God knows all possibilities and is actively involved in guiding the process so that His will is ultimately accomplished while allowing for the free will of humankind. Teh free will of humankind has natural limits - based on biology and status, as well as our social, political and physical contexts.
There's the fundamental issue between Open Theism and Calvinism. Open Theists see God as actively involved, bringing about His will through human agencies as well as direct involvement. The exact way God's will will be accomplished is not yet written, but God will ensure it will happen. The Calvinist tends to believe that it is much more "scripted" (for lack of a better word) and that God has already ordained very specific things to happen at pre-determined times. Most Calvinists make room for the free will of humankind, but it does not significantly affect God's timetable or anything that God has ordained.