Hi Unus,
After long time..... I know that thsi WAITING will raise lot many questions, ifs and buts in our mind.... Advising you to be calm and patient..... To answer your queries:
1. As your DMP send the medicals on 24th Feb please calculate 15 BD there after which is coming to around 16th of Mar'12. So you can expect Medical recv line on or after 16th Mar. (It may happen that on 2nd week ending of Medical sending date you may see Medical recv line but those are very rare cases.... & sorry to say but we are not one of them).
Your medical line will appear at "IN PROCESS" state only... so at first screen you will get the status as IN PROCESS and in detail update you will see medical line. (As after this directly DM status is there so they can not put you on that status unless and untill they come to the conclusion of granting you your PR)....
2/3. As you said you send your PP/MR/RPRF to NDVO as requested by them only.... If they didnt ask you about the new PCC when yoru documents will get open again at the time of decision making (if they notice) that time if they found that PCC is required they will not ask you about the same by returning your PPs.
If it is not required then they might grant you your PR without asking PCC again....
If they need they must have asked you in earlier (MR) request only (just confirm the letter issued by NDVO again).... and as you correctly thinking that without PP you can not apply for PCC... then why are you thinking so much.... Just pray to god that everything will go smooth and you will recv your PP back with VISA STAMPING in one or one n half month........
So be calm and have faith....