Does anyone know if there is a way to insert a file that you found using a strfind into another script on a specific line?

Yes,
you can handle an uncompiled *.was file like any other text.
When you find the line of text you wish to insert, you could open the script using
fopen 0 "scriptname.was" readwrite text
Then could you use fgets to find the line above where you want the script appended.  Use the fputs command to add the string to the script.

if compile "scriptname.was" ; compiles the .was
  chain "scriptname.wax" ; chains the .wax file.
Endif

I found myself saying "could" a lot because whatever dynamic information you are trying to include could probably be handled better through .ini file variables.

Robert