[TYPO3] frontend user registration with verification code

[Gideon So]

Hi list,

	I would like to do the following:

	1. Someone buy a book. There is a verification code inside that book
	2. The book buyer visits our website and try to create a frontend user 
account
	3. He / She has to fill out the form in which he has to provide the 
verification code comes with the book
	4. typo3 check if the verification code valid
	5. If the code valid, assign a specific usergroup to the user

	Is this possible??

Gideon