In VBPs, you can say "script /path/to/something.vbp" and then set FILE scan=whatever lines and 'global varname=value' lines, and the script vbp will use those global variables and such. On Nov 30, 2007 6:59 PM, Dongbo Hu <dongbo at mail.med.upenn.edu> wrote: > What do you mean "variable substitution"?