The only difference between a 1.4 and a 1.5 is the remove the ground and the 3.3v charge from where the pin header goes. So, all you wuold have to do, is install the pinheader, or the Solderless Adapter, and then solder a wire from a ground spot to pin that should contain the ground, and a solder another jumper from the 3.3v charge to the pin that should contain that charge.
I saw a tutorial on this somewhere. I will try to dig it up for you.