Wirelessly posted (htc Pocket PC: Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 7.11) Sprint MP6950SP)
Opera 10 is really very different than 9.7 so it shouldn't ask to overwrite. It will probably just ask if you want to make it the default browser.
I would not uninstall 9.7 if I were you. In my opinion it is better anyway.
Push internet should stay disabled because it is a setting within the os and sense.