Seems the guys at
Over-Clock.com needed to recharge their Prometia or Vapochill system and took it upon themselves to home-brew a recharge facility.
While Techwarelabs does not advise recharging your own, it does make for an interesting read and the method used is very similar to the ones used by professionals. In the end, however, leave this kind of work to a professional, otherwise your endangering yourself, your equipment, and everything around you.
Most Sears and car automotive repair shops can recharge AC systems without damaging themselves, your equipment, and the environment. They also do so legally and for a small charge.