The Fritz50_to_51_Patch.zip file you have requested: Modifications / Mini mods / Fritz Bot / RtCW Fritz Bot v0.51 Patch - 1.03mb is not available. Perhaps try browsing all files for the game Return To Castle Wolfenstein and upload any files you want to share or are missing. This is the only information we could locate:
If you already have Fritz 0.50, just download the 50_to_51 patch, extract it into your fritzbot directory, and your set. There are a load of bug fixes, some new features, and a new map "SF_COBRA" in this release.