Need help BC PNP

[cec_canada]

Hi -

Seniors need help

My new employer will help me for applying BC PNP and offered me permanent job.
We will submit the application for nomination this month
I will end my employment with my old/current employer on April 4, 2014
I have my current wp (old employer) which will end July 2014


Question:
Can i still stay (in canada) till the end of my current wp (from old employer) even i am already resigned from the company?
When can i apply for the new wp? is it after i have submitted my BC PNP nomination? or i have to wait for the approval/nomination from BC PNP office?
How long will it take before i can apply for the new wp?

also,
can i apply for BC PNP and Canadian experience class at the same time?

Thanks in advance!