Este es la mas reciente version http://solor.wtf.la/Windows.7/Additions/KB982861.Internet.Explorer.9.0.beta/Windows6.1-KB982861-x86.msu Puedes extraerlo con Universal Extractor o con /extract
All you need to do is copy the dll to the folder and use regsvr32.exe to register it BTW will wait to update this addon until it is available to dl from site (when he decides its final)
No, it will remain "as is"...the reason I left them is if you install sp3 on a live mce install the files stay the same All you need to do (if you want) is delete them from the addon