Convert existing DB to Joomla/Virtuemart

I have a database from my client, and I want it to convert into Virtuemart+Joomla database. So, if you have sound Virtuemart, Joomla, and Sql skill, give me a brief how will you do this(just overview of steps). For example: Existing customer table has these fields: customers_id(int), customers_gender(char), customers_firstname(varchar), customers_lastname(varchar), customers_dob(datetime), customers_email_address(varchar), customers_default_address_id(id), customers_telephone(varchar), customers_fax(varchar), customers_password(varchar), customers_newsletter(char), customers_group_id(smallint), customers_group_ra(enum), customers_payment_allowed(varchar), customers_shipment_allowed(varchar). I also want a few fields to be added in Joomla registration form. I need it done very quickly, and accurately. My budget is $100, but a lot of other projects to come. Looking for a long term business relation. Products has been added to Virtuemart but you can remove and re-enter in the way you like.