Anton,
It sounds like you already have LabVIEW/LabVIEW RT 6.1 on your PC, what you are looking for is how to get LV RT 6.1.3 installed on your FieldPoint controller.
Starting with the FieldPoint 5.0 distribution, you can get older versions of the embedded LV RT drivers. If you run the FieldPoint 5.0 installer, You can get the LV RT 6.1.3 embedded support. Note, this will not install the LVRT 6.1 module on the host PC(I'm assuming you already have that), this only makes LVRT 6.1.3 available for installing on your [c]FP controller through the MAX install wizard.
You can get the FieldPoint 5.0 distribution here: http://digital.ni.com/softlib.nsf/websearch/C17B06F91F539183862570D6007EA79D
Does that help?
-Tommy