The questionnaire to get the relevant application package can be a bit of a ball ache. I believe these are some of the important responses you should give to get the correct application package:
What would you like to do in Canada?
Work.
How long are you planning to stay in Canada?
Permanently.
What is your current country of residence? If you are presently in Canada, you should select Canada.
Canada.
What is your current immigration status in Canada?
Worker.
Does one of the following apply to you?
I am subject of a removal order that is unenforceable
I applied for a study or work permit before entering Canada which was approved, but not issued at a port of entry; or
I applied for permanent residence to an office in-Canada and was determined to be eligible for permanent resident status (first stage approval).
Yes.
Have you been told by a Citizenship and Immigration Canada office that you are approved in principle for permanent residence in Canada?
Yes.
Have you submitted a permanent resident application in Canada?
Yes.
Do you have a written job offer?
No.
Employer contact/offer letters are not required for the BOWP. As it's an open work permit, requiring employment proof would be a little redundant.
Hope that helps.