Been in the United States for about five months on a B1 visa and married back home.

The divorce decree should be acceptable. You would need it to be translated and certified by a translator

If a permanent resident alien conceals his status from his criminal defense attorney and pleads guilty to an offense

Doubtful. Plus the Judge will advise you. You cannot conceal information from your attorney and then blame the attorney for not knowing that...

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I got my I-140 approved tru EB-2 , medical exams is done. Which forms do I need to file to get my Green Card?

travel permits, work authorization, biographic data information

Can my husband have trouble getting his green card?

He will need ot file for an I 601 waiver

H1b amendment with extention.

Yes they can file for an manedment with extension. It is usually preferable ot do so before oyu move locations

State or province issue.. I am from Bosnia and Herzegovina, we have 2 entities and 10 cantons, what to put for state or province

you can just state n/a

She can apply for a B-2 visitors visa

My L1 and I94 are expiring in July 2013. Can I94 extension be done till Nov 2013 and do fresh H1 in parallel in April 2013?

How long have you been in L status as it counts towards H status. Why dont you extend oyur L status?

Can i retain my green card holder status if the parents on the documents aren't my real parents...

Most likely. You procured your pr benefits through fraud. Discuss the matter with an attorney.

Do I need to file a separate I-130 application for each parent?

1. Yes 2. no your parents will have to sponsor him or you can sponsor him in a separate I130 petition but it will take atleast 10 years 3....