Chris,
If those new machines are Win2000, make sure you have admin rights when you are installing the executable.
Using long filenames could cause a similar error. When creating any folders, make sure that the folder name is not too long and does not have any spaces.
Also try copying over all the files from the cd to the hard drive, and start the install from there.
If none of this helps, you may need to recompile the program and making a new exe.
Zvezdana S.