Hey silicon, sorry about the confusion...
at the bottom of the cuBase download page is some text that probably goes un-read and falls into Gary's category as RTFP
Instructions: Most of our files have been encoded with MacBinary format (.bin) so that the data and the resource fork of the file will not be damaged when storing the file on a non-Macintosh file system. After downloading, if the file does not automatically decode by double-clicking, we recommend opening StuffIt Expander and Selecting "File" and "Open" to decode the downloaded file. StuffIt Expander is included in every Mac OS 9 installation. Additionally, once the StuffIt Expander app is open, check EDIT > PREFERENCES > INTERNET and "use stuffit expander for all available types"
You are not the first and won't be the last member that gets a little confused on our images. Unfortunately, a managerial decision had to be made very early on (over 10 years ago) where we weighed out the pro and cons.
Members using old macs would PM me saying the image was corrupt since it had no icon and would auto launch Toast (this happened when downloading straight ISOs or Toast images with no Mac Bin encoding)
OR
Members using modern macs or PCs would forget to "decode" (remove the .bin) and PM me saying the ISO image does no work.
One solution would be to have BOTH a toast.bin and an .ISO for every CD image, but that energy in no longer avail, since those downloads took about 6 months to get all together and image.
Either way, glad you got it working