supernec installation problem

i am trying to setup latest version. but it says power.m and system.dll files are also located in matlab folders.. what can i doo for them even i rename these files it gives runtime errors. my matlab is R2007a..

Supernec does not work with Matlab versions newer than 7
It even has some problems with MATLAB 7. I use MATLAB 6.5 for supernec.