first of all sorry for the broken link. I have heard about the USB-UIRT it is good.
But if I am writing an app to do this activity from a mobile for me.using x10 for home automation and using USB for IR transmission. I don't know how tough it will be.
I assumed that using the x10 IR transmitter I wanted to see if I can actually Control my Projector and AMP using X10 commands.