How to extend I94 for my case

[passemails]

Hi

My Important dates are as follows

First I got My Passport and it expires on Mar(2019)

Second I got My I797 and it expires on Sep(2010)

Third I got My H1b Visa and it expires on sep(2010)

Fourth I got My another I797 from new employer and it expires on Aug(2011)

Fifth I got My I94 While when I entered US for first time and it expires on sep(2010)
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First four activities happened while when I was in India.
Fifth activity happened while I entered US first time.

where I have to apply for I94 extension

Where I have to be present to apply for I94 extension.

What are documents required for I94 extension.

When I have start applying for I94 extension.

[sk4ih]

http://www.immihelp.com/visas/extend...rant-stay.html