What I do is restore the demo data and mix with my regular data. Restore from C:\Lacerte\20tax\Demodata

What you did wrong was get too excited in making the path long. NORMAL data is at C:\Lacerte|\20Tax\?data for idata (1040), cdata (corp),  etc Each of the modules have demos in the same demodata file so you wan do paragraph one for each module.

Be sure to check the main EIN or SSN is all 9's before processing.