jma
I've spent nearly 7 hours now downloading, extracting, redownloading. I'm using Firefox with the built-in download manager. I download large files all the time and I've never had problems with corrupt downloads before. I keep getting the error "please download and run previous packages". I'm ready to give up and just order the damn box.
In what stage of the installation is this happening? How far do you get? Do you see an "Extracting..." dialog or does it just fail right at the start? What operating system are you on?
It sounds like this message would be triggered right as you get to Part 2 and it attempts to extract the next set of .bin files.
My recommendation would be to try wiping out the temporary files and then run part 1 again. You can find them by going to the Run Prompt in windows and typing in %temp%
SONAR X2 Producer extracts to %temp%\SONAR X2 Producer
SONAR X2 Studio extracts to %temp%\SONAR X2 Studio
SONAR X2 Essential extracts to %temp%\SONAR X2 Essential
Just delete the entire SONAR folder in the temp location and then give it another go. Hopefully that helps but please let us know.