If you did not run the programs that are in those downloads, then there will not be a problem. But if you ran those programs, you should do a couple things. First, you should copy the lang0.dll from your Zoo Tycoon CD-ROM and put it in Zoo Tycoon's main folder. Second, you should see if there are any user ".dll" files in Zoo Tycoon's main folder that are larger than 1.8 MB. If so, move them out of Zoo Tycoon's main folder. But do not move any of Zoo Tycoon's ".dll" files. (Zoo Tycoon's ".dll" files start with lang0..., lang1..., lang2..., or lang3....) The messages for those buildings will no longer appear inside Zoo Tycoon, but at least there will not be any sporadic crashes due to the ".dll" files.