The new Cain will decrypt the Cisco Pix MD5 hash, but on my machine running 2.5 million brute force attacks per second it was going to take roughly 11 trillion years to crack.

I highly advise the use of a very large (40 - 80 gb if you can afford it) sized rainbow table if you want a good chance of cracking it in under a week or so. This is all included with the Cain download at

www.oxid.it