Thanks for the quick responses.
I have multiple partitions on the HD (i.e. about 6 virtual drives, one of which has Windows XP), hence the question about whether Acronis will expand each of the partitions or whether it will just leave 750GB unallocated.
How about the fiddly link thingies - don't they appear on SATA HDs? And how will I ensure the new disk is treated as master?
Yes I know I should ideally install XP from scratch, but now where did I put the motherboard drivers for my now-extinct motherboard? etc etc, not to mention the aggro of reinstalling all those many applications cluttering up the current HD
This is not my super fast up to date PC; it's just the one I actually do everything on.