think you are confusing the 'modes' of phone? 1) phone booted as normal has standard usb mass storage and 2) phone in BOOTLOADER mode it will show as a adb interface, bootloader mode is what you need to install pauls root mod and/or sebastions404 clockworkmod
1)windows usb mass storage
try it with usb debugging ( menu>settings>aplications>development - tick box usb debugging) ticked and unticked with phone booted as normal, let it install drivers automatically when you plug in usb cable
2) BOOTLOADER MODE
NOW take battery out, hold volume down and keep holding, insert battery, press power till it vibrates- release power only (holding volume down still) after say 10 seconds release volume down and phone should be stuck on start up logo, now plug in usb and it should install a different set of drivers along line of adb interface.
hopefully this is all the drivers installed
you are now in bootloader mode and should be able to flash super recovery or Clockworkmod
ANYTHING you flash is AT YOUR OWN RISK, not sure read up, ask people to double check 1st!
Im running win7 64 bit and its finds phone fine.
Edited by Gary_J_Wright, 27 April 2012 - 09:04 AM.