In Win7, the MS procedure for printing the output of a "print to file" operation (http://windows.microsoft.com/en-US/windows7/Print-to-fi...) doesn't work to a USB printer (HP DJ2050). Neither the correct port USB003 nor the LPT1: port works, even when I "Configure the Port" to include LPT1:. I can't read the file (it has no extension) in any program I've found. I see that I can do the same task easily by printing to .pdf, but is there any way to get back the receipt data contained in these "print to file" files??