You shouldn't need the FPGA module in order to accomplish this. Sometimes there's more to it than just copying the files over to the 7.1 filepath. But I see that you have 1.5.1 of the 1394 driver. It turns out that 1.5.2 offers support for LabVIEW 7.1. This should be the solution. If you already have a version of the 1394 driver, 1.5.2 is a free upgrade. As this is not a forum in which I can address this individually for you, feel free to shoot us an email by going to http://www.ni.com/support/ and selecting the option to "Email NI." As this gets targeted to the IMAQ group, we'll be able to help you get an upgrade which should take care of your problem.
Thanks,
Jim Laudie
Applications Engineer, National Instruments