The "clustTool" library is in fact not available for versions of R > 2.12 however, the "Design" library has been folded into the "rms" (Regression Modeling Strategies) library without change in function names. The clustTool library is only required for clustering models. The implementation of logistic regression uses the rms library so, if you only need the logistic implementation you should be fine. I think that I will rewrite the code and post a new version with some new bells-and-whistles. Hopefully ESRI will not have a problem with this.