Boot camp and Windowa 7 (64 bit)

Happy New Year to every one!
My mac is a 2.66 GHz Quad-Core with 8 GB RAM, a nvidia GeForce GT 120 video card and 3 1 GB super ata HDs.
Traditionally, one of the hard disks is dedicated to windows os and its applications. Since I got this mac I installed Vista (ultimate) to the boot camp hard disk. So far Vista worked fine, well, as fine as windows os works.
After all, I make use of vista just for two programmes, that is not possible to find in mac os: Final Draft 8.0 which can be worked in my language (greek) only in pc environment (!!) and microsoft flight simulator X!
Last week I upgraded vista to windows 7 (ultimate again-64 bit). Since I had too many files installed to vista so as to let them get lost I prefered to upgrade from vista to 7, and not to erase the whole boot camp hard disk, by choosing the according facility to windows 7 installation disk.
But first I tried to install Apple Win7 Upgrade Utility, which, by my mistake, I thought it would help. Off curse It didn’ t, giving me always the message that could not be opened.
At my third efford vista was upgraded to windows 7 straight forward. By great surprise everything was saved at its placed. Since then windows 7 os and all windows s/w seem to work properly. Additionally, every time I restarted my mac, when I push the «alt» key to my keyboard mac os provides me the opportunity to choose between mac and windows os disks.
But then I understood that things didn’ t go so fluently, as I initially thought. When I opened system preferences/startup disk I realised that the windows HD icon has disappeared. What does it means? What went wrong? Why I still can see windows and macintosh hard disks when I push the «alt» key, but I cannot choose it in the startup disk utility?
Any help would be greatly appreciated.
Christos Michalopoulos
Athens, Greece

Actually you don't need an EFI64 ROM to support 8 GBs of RAM. That is determined by the bus size and the memory controller. The ROM only determines the maximum amount of RAM that the OS can address. None of the Macs currently in production can support even the maximum supported by the 32-bit kernel. None have a wide enough memory bus. Of course newer models may support larger amounts of RAM when they are released, but for now there's not much need for using the 64-bit kernel except if you are developing 64-bit software and need to test its compatibility with the 64-bit ROM.

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