I am so sorry for the late reply here is a response that helped me with the application:
1. Request Letter (Very Important): Extension_Request_Letter
2. Make sure, you pay the PGWP application fee as well as $100 additional fees before you send your application.
3. You have to send your documents to "Unit 555" not Unit 202.
4. Overall Processing time for my entire application was 4 months.
5. Application Kit:
a. Document Checklist: Required"
1. Tick following options under ALL APPLICANTS: IMM5710, IMM5556.
2. Tick following options under WORK PERMIT: Passport, Current Immigration Document.
b. IMM5710: Required
Answers for some important questions:
1. I am applying for one or more of the following:
* An Initial work permit or a work permit with a new employer
2. Under "Details of Intended Work in Canada" Section,
Select What type of work permit are you applying for: Post Graduation Work Permit
Leave all other sections blank.
3. Under "Employment" section,
Mention your current work experience in first box. It's enough.
4. Under "Background Information",
Select "Yes" for "Have you previously applied to enter or remain in Canada?".
Add following line in box "*d)".
APPLIED FOR POST GRADUATION WORK PERMIT ON "Old PGWP Date". PERMIT ISSUED WITH VALIDITY UPTO "PGWP Expiry Date".
c. Attach photocopy of first page, last page of your Passport, PGWP and Official Receipt.
6. Use the fastest possible delivery service, I used Canada Post from Toronto. They charged me $55 and took 3 days to deliver the package to Vegreville.