Monitor & Track Printouts

Hi I need a simple project done to achieve the following: I need to track printouts in a network environment. Most of the computers are Windows based, but a number of them are Macs. Why do I need to track the printouts? So that I can know maybe at the end of the month that User X printed 20 A3 pages and User Y printed 10 A2 pages. The users should ideally not be able to uninstall the printer monitoring system (so it can be a service). There should be an admin interface for managing the reports. The following details should be captured: Date, time, User IP address, no of copies, color or BW, size of copy. The data should be stored in a MySQL db or the free version of SQL Server. Hope I can get someone upto the challenge. The source code will be available to me. Remember: Some machines are Macs.. That is the biggest challenge.