What form should i file to get my unconditional green card? how much is the fees?

You have to use Form I-751. The filing fee is $590. Please read the form instruction. (http://www.uscis.gov/i-751)

Changing employers on H1B

Your new employer has to file a change of employer petition. It takes 2-4 months. You can start to work for the new employer once USCIS accepted...

C P T while COS from H - 1 B to F - 1 is pending.

Please talk to your school's DSO.

File I - 130 pending , when I should apply for J1 waiver . can I file the waiver while file I 130 pending

You can file the waiver application Your waiver application must be approved before you file your adjustment of status application.

Will i have a problem getting my immigration papers?

Please give us more information such as your husband and your oldest child's immigration status.

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Can I get F - 2 visa while my HRR waiver application is in process ?

I agree with my colleagues. The embassy might not grant you F2 visa if a waiver application is pending/approved.

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When is the best time to apply for a J-1 Research waiver?

It depends on your situations. Many people, who are subject to the requirements, apply for the waiver before they change status to H1B.

You can always ask attorneys a payment plan.

Please retain an attorney and have him/her review your achievements.

Clinical research associate probably be a stronger H1B case than other two cases.