Urban Mueller writes: HD INSTALLERS REMOVED. Due to changes in copyright, harddisk installers of commercial programs no longer seem to be legal in several countries. They have been removed.
It seems that this is because of some new laws that forbid bypassing of copy-protections. Unfortunately, this also applies to all those old disk games which are all heavily protected. However, most installs are still available on the WHDLoad site and will hopefully stay there. But everyone should make backups just in case this site will also go down.