seul
Chieftain
It seems to me that the BTS Version that already includes Patch 3.17 is the culprit here, i managed to work around the issue by only installing the original Civ4 from my "Civ4 Complete" package and using an original, unpatched BTS installation CD (lets just assume I found that CD under a pile of socks in a drawer).
After installing the unpatched BTS the 3.19 patch would install without any errors, all is well now.
After installing the unpatched BTS the 3.19 patch would install without any errors, all is well now.