work permit as Manitoba provincial nominee

[samueln]

I received my LOA and sent my application package to CIC. I would like to come to Canada in order to look for a job , get a job offer, then with the MPNP letter of Support apply for work permit.
my questions are :
1. is there anyone here that did it successfully ?
2. what exactly the employer needs to do ?
3. how long does it takes to get the work permit within Canada? can I get it at the border ( Flag Pole) ?
Thanks