Where to get BDI-4
The latest release (currently 4.51) can be downloaded from:
An older BDI-4.38 release is still available. Please consider using the current release to take advantage of bug & security fixes.
BDI-4.38 md5sum: 0f74ceef21faff217d9ae1abd252e8cd
On dialup ?
If you are unable to download a 622Meg file, post a request to the mailing list. Chances are, someone will be willing to send you a copy.