online yahoo! and msn messages

I am looking to develope a program used to send a message to online yahoo! and msn messenger in bulk , it should allow to limit sending to specific areas or ready nick names or email list on yahoo or msn , any suggestion for improving the product are welcome ## 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 win95/98/me/nt/xp/2000