If you do not have a "real serial port", then you must purchase a USB to RS232 Adaptor... and the Radio Shack cable 20-289
So - This is actually a "Two part" solution.
1 - you need the 20-289 cable from Radio Shack (Light colored cable)
The Correct radio cable looks like this.
20-289 cable is Grey (or) Off White cable
2 - You also need a USB to RS232 hardware adaptor for your computer.
Here is a link to one at www.Tigerdirect.com - $19.95)
Search for "USB to 232" if the link doesn't work.
These are (also) commonly available from Best Buy/Circuit City and even Radio Shack.
I have just purchased a Radio Shack Pro-95 portable scanner and want to purchase your ScanCatlite-plus. You indicate that I need the radio shack cable, which has become quite a nightmare for me. It's almost impossible to find one in a store (I've checked 3) and then I found that the cable has a serial port connector, while I need a USB connector for my laptop. RS people were of no help in solving this problem. Can you?