I almost feel out of my seat today when I can across this! I've been looking for this for years... I had the CD's but lost CD 2 or whatever that had IRIX
http://knowledge.autodesk.com/support/alias-products/downloads/caas/downloads/content/studiotools-1302.html
http://knowledge.autodesk.com/support/alias-products/downloads/caas/downloads/content/studiotools-1302.html