Adware Installer Software

I need to have adware software created which can be bundled with other software for hidden installation on a user's computer. This must be done in C# with compatibility for .net framework. Briefly, the software queries browser/url entries for keywords and displays an ad related to each keyword. Must support the three major browsers: firefix, IE, and Google Chrome. Ads and keywords must be configurable from a php-based web-admin. This needs to be user-friendly software. Contact me for full specs.