Thought I would post an update to close this topic. The Wacom drivers for irix accessible fr9m the links I posted above work 100%. Follow in instructions in the link. The installation was very easy. I have been using the intuos2 serial version as there is always some available for sale on the bay. Just make sure you buy one that contains the ac adaptor that plugs into the serial cable.
When you install the irix Wacom drivers, I think you can use any size that the intuos 2 makes. From the Wacom tools icon, you can set everything up. The tablet can substitute the mouse all together if you wanted to use a pen instead of the mouse.
2x600mhz R14000 Octane2 dual head V12 / V10, 7 gig Ram
2x250mhz R10000 2gig ram, MXE, Digital Video, MSCSI, Jaleo
400mhz R12000 O2, 1gig Ram AV1 - 250gig Media' raid
180mhz R5000 Indy XZ 256mb ram
200mhz R4400 Extreme…….Under Construction
Dell T7600 dual 3.5 Xeon, 512 gb ram, Quadro K6000 + Tesla k20 - DaVinci Resolve Studio Editing
Dell T5500 dual 3.2 Xeon, 72gb ram, Quadro 6000 + Tesla C2075 - DaVinci Resolve Studio Cutting
Intel i7-990x 3.46GHz Extreme 6 core / Quadro 5000 & 2 x Tesla C2075 / 24gig Ram inside an SGI 320vw case
2x600mhz R14000 Octane2 dual head V12 / V10, 7 gig Ram
400mhz R12000 O2, 1gig Ram AV1 - 250gig Media' raid
180mhz R5000 Indy XZ 256mb ram
200mhz R4400 Extreme…….Under Construction