Hello,
There are three options here:
1. Since your iSensor comes with an USB interface, ask the vendor if they have a driver DLL that communicates with the isensor USB interface and PC. It looks like it comes with it's own software user interface, so usually they should have some kind driver DLL that user interface software based on. If they do have the DLL, you also need to know the functions included in the DLL, so that you can use LabVIEW "Call Library Function Node" to call the functions, hence create your LabVIEW driver for the sensor.
2. Second options, if you know the commands that talk to the USB interface of the sensor, you can use the Tutorial you mentioned above to try out LabVIEW visa. Tutorial - NI
3. The iSensor (ADISUSBZ) actually is made of two parts, one is sensor board, the other is the USB controller board. I found this NI driver for the sensor board with the use of LabVIEW FPGA. It uses LabVIEW FPGA to control the SPI interface of the sensor board... but for this option you also need LabVIEW FPGA hardware. Since you already have the USB controller board, maybe this option is not the option, I don't know. Anyway, below is the link you can refer to:
http://zone.ni.com/devzone/cda/epd/p/id/6264
Hope this will give some hints.
Irene