comoman,
The scanner came with a programming cable, but that requires a serial port. If your pc does not have one (it would be labeled as Com 1), then you would need either the Uniden USB-1 cable, or a USB <-> Serial converter cable. My two desktops have serial ports (one of them via an accessory kit I added), but my laptop does not. For my laptop, I use a converter cable. More on these can be found here:
Connecting scanners via USB - The RadioReference Wiki
If you can be more specific than "SE Oklahoma", like a specific city (?), or at least the county, then that would give a better idea of what Texas and/or Arkansas cities, towns,and counties might be in range, in addition to Oklahoma.
In order to use FreeSCAN, or any other programming software (I use FreeSCAN; it does an excellent job), you must be able to connect the scanner to the pc. Be sure and clarify if you have what you need to do that, or will need to accomplish that first. While it is to your long term advantage to be able to program the scanner by hand, through the keyboard, programming by software has a number of advantages, especially for someone new to scanners, or to that specific type of scanners. First, you can enter information much more quickly via a pc keyboard than the radio's keyboard. Also, you can see most, if not all, of the information needed and entered at one time. That makes it much easier to spot and correct simple errors and omissions as well as typos. Plus, besides being able to get a 'starter' file from someone else to jump-start your scanning, if you have a problem with a file you've created on your own that you can't solve, posting it here may lead to someone else quickly spotting what correction needs to be made. Usually, it's something simple that just got overlooked.