Never heard of 'ChomrDriver'.. and you didnt link to it.. so no clue what its for/does.
I would say that John W. has suggested the easiest approach.
You could also use a WAMP/LAMP type set up to also have some database logging. (I actually posted a fingerprint project for some other members that uses ethernet, PHP and MySQL to check for logging in/out times..etc.. if you do a search, might be a base to work from)
Either way.. you're not going to get away from having a pre-defined user/password list (somewhere).
The fingerprint scanner itself might allow for some extras? But what finger print reader are you using? (link?)
Does it allow for other information to be saved along with the fingerprint?
If so.. you could save this data at the same time you are enrolling a new person/fingerprint.
Are you concerned about security at all?
I would think logging each transaction to a database.. along with some minor PHP code.. could give you a pretty decent platform to work from.. (checking for in and out times.. or any other sort of behavior you might want to add.. locked out between x & x times...etc)