I am an in-country applicant. I received my FLR today with passport stamped until Aug 2009.
The HSMP documents that I sent were:
1. HSMP form with £400 fees.
2. Bank Statements (I made a grid to show all the salary component)
3. Postal payslips
4. Original Engineering degree certificate
5. Original Driving licence
6. Notarised copy of personal copy of my passport.
7. IELTS TRF
8. Covering letter
9. P60 tax return
10. Letter from employer
The FLR(HSMP) documents that I sent were:
1. Covering Letter
2. FLR(HSMP) form with £350 fees.
3. 4 months bank statement.
4. 2 photographs according to specification.
5. Valid passport.
The application time lines were:
A. Initial HSMP application (Took 15 days)
1. Application posted: 02nd July
2. Application received: 03rd July
3. Reference number received: 03rd July
4. Approval date: 17th July
5. Papers received: 19th July
B. FLR application timelines:(Took 9 days)
1. Application sent: 01st August
2. Reference number received: 03rd August
3. Approval date: 09th August
4. Stamped passport received on: 10th August
NOTE: I never sent any Urgent treatment form. Although I was tempted to, but the HO office guys have been super efficient.

Thanks once again for all your help. I will be around to answer any questions or help other members achieve their goal.