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Add file to Windows Scheduler to run on Startup
Open Windows Scheduler under Start>All Programs>Accessories>System Tools>Scheduled Tasks and add the star.bat script to the scheduler (should be saved in My Documents), have the task run "When I log on", enter the system password when prompted and click finish.
Restart computer and logon, during logon, you should see a black box pop up and immediately disappear. Confirm the script was successful by clicking Start>run and typing cmd and in the black box type "net use", without quotes. Lpt1 should be listed here.
Set your Printer to LPT1 under your Hardware Settings on the POS. You can now print to your USB printer as if it were LPT1. Test by logging in to the pos and printing a report.