Unzip to the directory of your choice Double click on newby.exe If you click on the help menu > contents Windows will give you a Can't Find error browse to the directory you unzipped the files into and select rescalc.hlp then click OK. It will now find the help file. Requires VB4 runtimes, should work on most modern Windows systems. Sorry the source code and install package are "lost" on a CD burned with a friends burner. My burner will not read the CD. Someday I will get a better burner, but till then...