How can I "right click" with a USB mouse on Android 3.1?

I've got a Logitech USB mouse and keyboard plugged into my Xoom, which is running Tiamat 1.4.4 kernel on top of Android 3.1. Both are recognized and provide input correctly, but I noticed that the right mouse button is treated just as a left mouse button click. I had hoped that this would instead act like a long press since that's something of an analogue to the right click concept, but I can't find a way to do so. This is particularly annoying because I'm trying out Splashtop and it makes a lot of things really awkward or downright impossible. Is there any setting (or other method) to make the right click button actually perform a "right click" type of action, such as a long press?