H1 Transfer while I-140 is approved.

[help2011]

Dear All:

I request expert’s advice on the questions below:

H-1 6h year Expiry: April 07, 2012
I-140: Approved under EB2 from company X

Questions:

1) What would be new H1B validity if I transfer my H1B to company Y in October 2011?
(a) April 07, 2012 (Until my current visa 6th year completion date)
(b) Next 1 year (from the date of transfer)
(c) Next 2 year (from the date of transfer)
(d) Next 3 year (from the date of transfer)

2) Until when my current employer X should keep my approved I-140 active or should not revoke so that my new employer Y can retain my old priority date.
(a) Until my H1B get transfer to new employer Y
(b) Until my new employer Y file my labor
(c) Until my new labor gets approved
(d) Until my new employer Y file my I-140
(e) Until my new I-140 gets approved

3) Can I transfer my H1B to new employer without informing current employer?

4) I do have photocopy of my labor and I-140 approval but not the originals. Are photocopies are ok for H1B transfer or we need original approvals of labor and I-140?

Your answers on all the questions above would help me to move forward.

Regards