If memory serves, that would be the Spectrum Commander series of software...there is also the original version of
Radio Manager. Note, however, to record audio requires a seperate purchase of RecAll Pro version.
73s Mike
[edit] I'm pretty sure
RadioMax also works with the 456 (you can download the manual free to be sure). John Catalano's recent MT review says it works quite happily with XP. I wrote a
RadioMax review at Strong Signals using a 895; while it doesn't address Optoscan features, it gives you a very good understanding of what the software does. It has built in recording capabilities, and is a whole lot cheaper than the Signal Intelligence products. It's also a whole lot easier to edit the datafiles this uses than the horrible editor Radio Manager uses.