Using multiple CSV files and Multiple HTTP requests for one User in a Thread Group

The following is the scenario I want to run in JMeter: I have one CSV file
(file1.csv) containing 100 userIds and passwords. I have created a Thread
Group containing 100 users. I want each user to read one row of userId and
password from file1.csv. For this I have added a CSV File Config element.
Now, I want each of these users to read another CSV file (file2.csv)
containing 500 rows. Each row contains parameters for a HTTP request.

So, I want each User to read one set userId, password from one row of
file1.csv and with that one set the User with fire HTTP request 500 times,
each time reading each row of file2.csv.

Can you please tell me how to design this in JMeter?

Thanks!
Kajari