Yes, I've actually driven JTAG using DIO, but this was a project in itself. I guess you're just wanting to get the job done! I'm currently evaluating gear to do the same job myself, in addition to interconnect testing. I've been looking at JTAG Technologies equipment. They do PCI/PXI cards and the SW, with a LabVIEW interface.
You'll need to be sitting down when you get their quote though - their development system costs about the same as a decent car!
Kristian@krause.dk wrote: >Anyone got experience with LabView and JTAG ? >Especially in system programming of Altera and FLASH