Hi SA,
Get a USB caddy (3.5 in HDD) from Maplins. Put your old Hard drive in that and then you can just copy the files to your new computer.
It will give you extra storage space for all your pictures and you may not need to transfer the files at all.
Cost about £30.
If you have XP on the new computer there is not installation required - Just plug it in and away you go.
MC