I have been going through the innumerable posts with alot of useful information about the newly introduced Tier 1 PBS. It is heartening to see so many people willingly offering help and advise to others

Firstly, let me explain my my situation. I am currently working in the UK on WP. I have now got a good offer from a multinational company (which I will be accepting very soon). However, the only problem is my workpermit. It expires only in december of 2012. I am not sure if I can ask the HR of my prospective company to transfer the WP into their company's name since the WP rules are changing in Sep/October and from then, they will have apply for a license for every WP holder they employ which means shedding money. They might aswell employ a British/EU national without spending any!
I have now decided to convert my WP to the Tier 1 PBS which will allow me to move freely between companies. I currently undertake supplementary work as a consultant for 20 hrs (legally) apart from my full-time employment. I want to show this as my earning in the UK in order to qualify for tier 1 and I am also willing to get a letter from an accountant.
I appreciate that trasferring the WP into the new company's name is much less of a hasssle but the new rules being implemented from sep/oct are a real PAIN!
I know it sounds really complicated but could someone please tell me if this can be done and if so how? Am I following the right procedure. Will I need to send them any additional documents proving my supplementary work is legal and salary I am paid?
Also, from the various posts I have read, I have understood that the time line for Tier 1 as of now is 5-6 weeks? Is this right?
Many Thanks in advance!!!