Frustrated!

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Ok guys help me out,lol..I've recently jumped ship from symbian os over to WM5(MDA Pro)-1st impressions are not good!Anyhow,I've tried installing opera 8.5beta(several times)and keep getting the following msg.Installation of opera wmpp5 85b2 cab was unsuccessful-why?I really need this browser as I currently have pocket I.E.,thunderhawk2 and opera mini-all below par in my opinion!ooh that brings me to my next issue-how do I stop that annoying msg that occurs when using a midlet that accesses the net...you know..this midlet wishes to access the net,it's not trusted blah blah(keep having to press yes to allow)-please tell me their is a solution.Rant over,lol..any advice will be appreciated,thanks