thepirategamerboy12 wrote:Is there such a thing as a program that'll allow me to change IRQ settings, etc. in DOS instead of the BIOS.
Unfortunately, no. DOS relies on the BIOS to provide accurate information about IRQs, I/O addresses, etc. As chinny22 points out, newer OSes are better at resource management precisely because they are not so tightly coupled to the BIOS. Newer OSes take information reported by the BIOS "under advisement," but they can and do make resource reassignments, at least for hardware that does not use jumpers for configuration.
thepirategamerboy12 wrote:I did order another CMOS chip, but it hasn't come yet.
So it might be a good idea to hold off until you see how the new CMOS chip pans out. If the CMOS works properly, I suspect that the DIAG.EXE program will work as well.
I would second chinny22's suggestion to test the DFE-530TX+ in another (known-to-be-working) machine if possible in the meantime.