Internet Explorer Extension - BHO sample

I am looking for the following functionality of proof of concept extension: Insert <script src="[...]"></script> into a specific page React to DOM changes - Framesets/iFrames added/removed by application - should insert the JavaScript there Get user credentials from Windows environment - if possible Internet Explorer 10 and 11 support Easy install - how to build a package instructions, best approach It will be used as a sample to try few things (source code needed), future development and finalization possible by the same party. I need a quote and timeframe.