Thanks modus0  for the detailed info on how to add external runtimes. It works like a charm. Will probably go with a second internal drive rather than the external USB 2 I got now (too slow). As for those of you wondering about Vista, it is a free download from Microsoft, you simply register for the Beta program. You can install it as an upgrade to your current OS, but I don't recomend it (I had all sorts of problems). Instead save all your important docs, etc, and do a clean install (wipes your drive clean). Vista is ready now, this was final beta. Next month it goes to the computer companies so they can ready their new systems for early next quarter sale. I have a 4 year old Compaq AMD 2600+ with 1 gb ram and Vista Ultimate works fine on it. Extremely stable. All my 3D programs Poser, Bryce, Hexagon, Carrara and my games, WOW, Half Life 2, Call of Duty, Fear, Doom 3, etc, work fine also. Vista feels like a cross between Mac OS X, Windows 2000/NT and Media Center. The permissions system of changing files, deleting things is a bit of a pain, but the overall experience is pleasant. I was very pleased that my 3D programs worked so well seeing as Vista uses a new version of Direct X. Again thanks much to all.