Your questions are actually a good example of why there is a waiting period between joining the board and asking for permission to write missions. During that time you can read missions others have written. Be sure to also check out some of the badfic the appears in these missions (PPCers that post on LJ often provide links to the badfic). Then you can see what bits of fic are quoted in the missions, which are paraphrased and which bits are left out to make everyone's lives a lot simpler.

The real answer to quetion no 2 is: if you don't know which bits of the badfic to quote, you are not ready yet to write missions.

May I ask how long you've been on the Board? I don't recall seeing you around here much, if any.