Keep variables through courses

Hey!

So, I got one course built up from 5 captivate files.
I want the user to write his/her name in the first file.

Is there an easy way to keep a variable through these files?

They layout of the course is like this:

                              Front page

             /               /              \               \

    Course 1  Course 2    Course 3   Course 4

The user starts on the front page, and goes to one of the four courses.

I want the user to write his/her name at the front page. And then keep it form the front page to either of the four courses.

Thanks in advance!