I betaed the program on NT and 98SE The beta testing was boaring. It did just what it was supposed to do. No exciting system crashes. No frozen screens or blue screens. I could actually reapply the MAT files after I made them. I had previously been using the MKTools PPP Scripts and I like this program better and you don't need PPP to use it. I think this program will up the antie in the store. You should routinely get MAT files with purchases this makes it too easy.