Just be aware thet repeated removal/insertion of the IDE cable to the HDD runs the risk of snapping one of the pins (as happened to me). Tears at bed-time!
Funny you should mention that - I did that today with a brand-new 80GB laptop drive
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BTW None of the above, if you have a spare IDE cable it might be easier to attatch it to the Vista HDD and switch them at the motherboard end, depending on the layout of your internals, to get around the pitfalls Saab mentioned.
BOFH