My old computer died a terrible death leaving me without a Windows XP machine. I did come by a Windows 7 machine which has a printer port.
The install of both programs (Aspire and Mach) went about as expected and both run BUT: Aspire can't find Mach to pass the code directly and I am hesitant to connect to a running machine unless every thing works.
A kind and generous soul made the following available to me and I will re-post it here in hopes of easing someone else their headaches.
Here is a zip file that you can download, (then extract, as a reg file is not allowed as an attachment here) double click the "Aspire.reg" to install the info to the registry. should make it a lot easier then editing with regedit.