Submission of PP...please advice

Hello,

I am right now staying in Canada. I applied for Canada PR at New Delhi, India CHC. I received my medicals request from embassy a few days back, which took around 30 days to get to Canada. I have few doubts regarding the process. Please advise me as I am really in confusion.
1. I have undergone the medical examination yesterday. DMP told me that he will forward the medical reports to Ottawa. But, should I request him for a letter (saying that I completed my medicals) and sent it to New Delhi CHC.
2. When should I send the passports to CHC? Because, in the letter sent by CHC they said “If you reside outside India, do not send your passports until requested to do so in a separate letter”. So, shall I wait for CHC to send another letter or should I send it now itself? I am worried because it will delay my process as it takes long time to mail the letter to Canada.
3. Is there anybody who had a similar experience?
4. Is it only I received this kind of letter (asking to submit passport later because I am not in India) or will they ask everyone to send the passport immediately after the medicals in the letter?

Anyone with similar situation, please share your experience/advise me. Experts plz reply.
Thanks in advance.