I think all of the CD's floating around out there are homemade using files from the Toyota TIS Web site. Toyota doesn't actually sell a CD-ROM manual. There are some good ones out there, where people spent time indexing the files. And then there are not so good ones...
Toyota would make life easier if they just offered a CD-ROM manual. They want over $300 for a complete set of paper manuals... I'd give a $100 for an official CD-ROM and save the tree in the process! But their own dealers use TIS, which can be updated immediately as errors are corrected, so I guess there's no incentive for Toyota to produce a CD-ROM.