reservation/booking script for a hotel

Hi all. I have searched the net for some PHP scripts to do reservations for hotels. Where there are multiple rooms which can be booked for a single day or multiple days. However what I've found is not good enough and am considering writing my own customing booking scripts, but before I start I dont want ro reinvent the wheel so I was wondering if anyone has encountered any really good scripts for the above? thanks in advance. -- Angelo