Thanks a lot for your precious advise. But for more clarity before I go ahead, I initially sent those application forms(i-485, i-130, i-864, g-325, i-765) to san antonio uscis field office, they returned them to me after 2weeks with a letter from them that I should send it to the right address and they also had each forms stamped "RECIEVED with date" I have to re-mail the application to chicago lockbox. Do, you advise I should send the returned stamped forms from uscis san antonio office to USCIS Chicago lock-box which is the appropriate address? Thanks in Advance for your advice!!

Those are what we call one-step forms. Are you sure you qualify for filing those forms? You really should talk to an attorney. If you decide to go 'bare' and do-it-yourself ... go ahead and follow their instructions ... it may work, it may not.