Hi
If this MSI refers to the Quest Shared Web Parts qDiscussionView Web Part installer (qDiscussionViewWebPartforSharePoint32bit_52.msi), the download size should be about 27MB. I have just downloaded and tried on Windows 2003 R2 Server with WSS 3.0 on x32 bit machine and it worked just fine. I am not sure what to suggest but maybe download it using different browser?