The help file states that spacing between characters(also known as kerning) is only available on the Mac version of PSM, but the truth is that there is a way to make it work on the Windows version.
In Microsoft Word, if you have a word that has some spacing between characters, you can simply highlite it and copy-paste it into a text object in PSM, and the spacing will be kept! Furthermore, if you type this in word: "@myvariable@", add some spacing between characters, and then copy-paste that in PSM, it will become a variable, so it is possible to have variable data with spacing between characters!
Have fun with this little trick!
Raphaƫl