synchronization to full laptop? Can I use HTC shift as replacement of my current mobile phone (currently I use simple nokia phone)? Do I need to synchronize HTC shift to a laptop as usually PDAs do or can it be stand alone? Are there any products comparable to it such as Samsung Q1 Ultra or else? Which is better? Can I install full programs the same as in my laptop (I need to install Mathematica (TM)), Microsoft Word with Equation Editor, HP printer driver, my Kodak camera driver, etc)? Can I install Windows XP into HTC, instead of Vista, because Vista is slow? Thank's.