Found this on http://usvisa-info.com/en-CA/selfservice/us_before_you_apply might help you guys too.


How to Get Started

Each applicant must complete the following before scheduling an appointment through this service:

Step 1:

• Complete the Nonimmigrant Visa Electronic Application, and print out the DS-160 confirmation (barcode) number for each applicant. The application can be completed at https://ceac.state.gov/genniv.
  • Certain visa types may require additional forms to be completed:
    • DS-156E, application form should be completed by any applicant applying for a Treaty Trader (E1) or a Treaty Investor (E2) visa found at http://www.state.gov/documents/organization/79963.pdf.
    • DS-156K, application form should be completed by an applicant applying for a Nonimmigrant Fiancé(e) Visa at http://www.state.gov/documents/organization/82063.pdf.
  • Please note this visa information service does not answer questions relating to the DS-160 application. Please visit travel.state.gov
• DS-160 INSTRUCTIONS:
  • Any errors on the DS-160 will require correction or the need to submit a new form.
    • The DS-160 must be completed in English.
      • Applicants who do not complete the DS-160 in English will be required to either edit their DS-160 or submit a new DS-160
    • Applicants who incorrectly choose the gender on their form will also be required to either edit the DS-160 or submit a new one.
  • Applicants who do not generate an actual barcode, in addition to the barcode number, and who do not click on the final "submit" button have not correctly completed the DS-160.

Step 2:

• Pay the visa application (MRV) fee for each applicant. Click Fee Payment Options to view more details about the MRV fees and payment procedures.

Step 3:

• Schedule an appointment at the Consular Section through this service.
  1. To schedule an appointment each applicant must have ready:
     1. DS-160 confirmation (barcode) number
     2. MRV fee payment receipt number (See Step 2 above)
     3. The applicant’s passport number
     4. Additional information may be required based on the type of visa for which the applicant is applying. For example, a:
        1. SEVIS number from the Form I-20 for Students or Form DS-2019 for Exchange Visitors
        2. Petition Number from the Form I-797 for Temporary Work Visas
        3. Case Number for Immigrant Visa applicants

Additional information concerning U.S. visas can be found at http://travel.state.gov/visa/visa_1750.html