Please help if you know the answer!

Have a series of tables in a MySQL database. I want to create a questionairre over multiple pages.
Each page inserts the answers into the relevant table.
The problem is I need to be able to match up the data from the tables at the end, e.g. by passing a unique ID created with the inserting of a record set onto the next page where I can retrieve it and insert into a second relating table.

Hope that makes sense!

thanks

Paul