Im currently using the dataram ramdisk with my SSD's, can be found here http://www.dataram.com/products-and-services/ramdisk/
Ive set my temp locations to use it, its a piece of cake to setup and is free for sizes <4GB
I tried a couple before using this one, it seemed the easiest to setup and supports Windows 7 64bit, it will also auto start without having to use images, which I prefer.