You would have to file with USCIS a packet of several forms: Form I-130 Petition for an Alien Relative; Form I-485 Application to Adjust Status; Form I-765 Application for Employment Authorization; Form I-131 Application for Travel Document; Forms G-325A for yourself and for your wife; and Form I-864 Affidavit of Support. All these forms are available on-line at uscis.gov, along with instructions for each form. Pay special attention to the requirements for supporting documents; failure to include even one of them can result in denial of your application or in a long delay of its processing. The filing fees are noted in the instructions; basically, you need to be ready to pay $420 for I-130 petition and $1.070 for everything else. Should you find yourself averse to the task of unraveling the instructions, or to the risk of making a mistake in the application package and the resulting loss of the filing fees (when USCIS denies an application, it does not refund the filing fees), retaining an immigration attorney would cost you about $3000 (+$500 if you want the attorney to accompany you and your wife to the interview with USCIS officer). If the paperwork id done right, your wife should receive employment authorization card in about 3 months after filing; and you and your wife are likely to be summoned for the interview sometime between 3 and 12 months from the date of the filing. If USCIS approves the case, your wife will receive her conditional green card, valid for 2 years, within 1-2 months after the interview.
Answered on Jan 09th, 2013 at 4:19 AM