Custom Internet Spider

I would like advice on persuing having my own custom Internet spider program developed to query the web for specific criteria. The spider should work virtually 24/7 and would need to be customizeable for keywords and search repetitions. Does anyone know about these things? Can I run it from a broad band connection (always connected) and a personal PC? Etc..... Your help is very much appreciated. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Complete ownership and distribution copyrights to all work purchased. ## Platform Windows 98/ME/2000/XP