MzTake is a DrScheme tool distributed as a self-installing ".PLT" file. It will install MzTake into your personal "collects" directory.
If you are using DrScheme v208, or higher:
http://www.cs.brown.edu/research/plt/software/mztake/files/mztake-208.plt
Older versions of DrScheme: The version of FrTime in your distribution is not compatible with MzTake. To run MzTake, we recommend that you upgrade to DrScheme v208, and use the distribution above. If you do not wish to upgrade, you may use the distribution below, which will replace the version of FrTime in your distribution with the current version. We cannot, however, guarantee that this will work properly with versions prior to v207:
http://www.cs.brown.edu/research/plt/software/mztake/files/mztake-frtime-pre-208.plt