If you like to install a RamDisk I can recommend ImDisk. Its free and supports 32bit and 64bit:
http://www.ltr-data.se/opencode.html/#ImDisk
Here an instruction for configuring ImDisk + some tweaks:
http://www.thessdreview.com/Forums/showthread.php?t=1834
SSD HDD is definitely the best choose to have good performance instead of using App or USB Key to boost cache or else in your Computer / Laptop.
darksabersan.