Pick up a universal USB drive adapter and connect the old HDD to it, then install the SSD and use a bootable CD/DVD/FLash drive of Macrium Reflect Free or CloneZilla to clone the old drive to the new SSD.
Better would be to do a clean install to the SSD then copy your data from the old HDD to the new SSD.
You can get a Vista install ISO this way:
Request a Vista ISO with SP1 and SP2 included
Ppost here and ask Peter (Ex_Brit) to send you the link to the versions of Vista you need, 32 or 64. Include your E-mail address mucked up, like abc at xyz DOT com then edit your post and remove it as soon as you receive the link.
The ISO Peter provides has both SP1 and SP2 applied.
Pick up the Tutorial: How to Download a Vista ISO and Create an Installation DVD or USB here:
To Create Vista Installation DVD or USB Flash Drive with ISO File
During the install, when asked for the key, don't enter it. You will then be given a menu where you can chose the version you want to install.
Activate once the install is completed.