I have posted a new TS-590 HOWTO on Remote Operation. Go to the TS-590
Scroll down to the end of the "HOWTOs" section, then click on the link:
"*** TS-590S HOWTO: Remote Operation".
The HOWTO has full details on setting up the TS-590S for remote
operation over the internet, using Skype and TeamViewer.
The twist? The HOWTO also describes the capability of the TS-590S to
send monitored sidetone audio along the same path as the RX audio. This
means that from the comfort of your local PC you can listen to the
radio’s TX Monitor, letting you check and adjust the quality of the TX
audio in (more or less) real time -- no more guessing how your signal
might sound thousands of miles away!
The TS-590S Resources Page: