The Civ4_1.61.zip file you have requested: Official Patches / v161 / Civilization IV v1.61 Patch - 45.74mb is not available. Perhaps try browsing all files for the game Civilization IV: Beyond the Sword and upload any files you want to share or are missing. This is the only information we could locate:
2K Games has just released a new patch for Civilization IV. The patch has a number of new and exciting features including new scenarios and map scripts, unit adjustments and enhancements, and more.