Hard to tell for sure what's going on without a precise description of what steps you take (are you installing as root or as another user ?... In which directory do you install the viewer ?... In which directory is the Snowglobe archive you are trying to use ?... etc...).
This looks like a permissions issue... Your Snowglobe archive is probably located in a directory you can't read from, or is itself set as non world-readable (is it owned by root and are you trying to install as a normal user ?)... or the archive itself is corrupted.
In any case, you don't need to specify the Snowglobe archive location if it's held in your HOME directory: the installer will find it automatically there.
Try the following:
- Verify your files and directory permissions.
- Delete your old Snowglobe archive (or move it away and don't tell the installer where it is) to trigger the downloading of a new one.
- If you couldn't find what went wrong and it's still not working, install as "root" (will get automatically rid of any permission issue).
- If all the above fails (it's impossible, but well...), you can still extract manually the proprietary components from the Snowglobe archive you got (it'd be a way to see if it's corrupted or not), and place them yourself in the Cool VL Viewer installation directory. They are bin/libllkdu.so, bin/SLVoice, lib/libkdu.so and lib/libvivoxsdk.so.