Congratulations!
I am in Canada case. I sign the PPR email and finished the last page, Passport, 2 passport photo( stamped and signed name and birth), a Canada Post return mail without address.
For my case
NA-Next step is conduct Background check-You application is in progress-We are processing your back ground check- NA- We are processing your background check-PPR
I have the same processing stages like you. I think maybe NA1 before IP2 or NA2 before PPR.
Some of people think "we are processing you BGC" is IP1, some of think it's Ip2.
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We will send you a letter to tell you how to get the medical exam after we send your application to the visa office."
I believe CIC is going to give a mail. Not e-mail. It shows how to do it.