Gigabyte Motherboard Hassles

I upgraded my motherboard from an ECS K7S5A Pro to a Gigabyte GA 7N400 Pro 2 board last week. Fun. After getting the BIOS calmed down (I thought), the machine would only shut off at the power switch; the little shut off button on the Windows XP screen didn't shut it off, it just restarted it. After posting questions to both Gigabyte and Microsoft, and formatting the machine because neither of them had answers (other than Microsoft's representative throwing his hands up and telling me to reformat and do a clean install of WindowsXP -- stupidly I believed him). The machine STILL wouldn't shut down. After trying everything I went through Power Management in the BIOS and started disabling things. Guess what worked? "PowerModemOn", even though I don't have the modem on the board enabled.

OK, so I figured that was it, and tried to play a couple of the Medal of Honor expansion packs, and Call of Duty from Activision, and I get this message in an error screen entitled "Cannot locate the CD-ROM" : "Please insert the correct CD-ROM, select OK and restart application."

Now I had just installed ALL of the above games from the CDs, and when I pop them in I get the opening screens that say "Play, Install, Single Player, Multi Player," etc. So it recognizes the CD is in there. I click on "Play," and I get the error.

Interestingly enough, the original Medal of Honor Allied Assault plays, but its expansion packs don't. Other games such as Mafia and Diablo 2 play. It's not as though the machine doesn't see the CD, and the disc contents show up if I look at the drive in My Computer.

Am I missing a setting in Device Manager or something? The IDE ATA/ATAPI Controller gives me a whole bunch of different possibilities as to how to set up the drives. What should they be set at? (Primary and secondary channels right now are set at "BIOS default," which is Multi-Word DMA2).

These Gigabyte boards get great writeups in Tom's Hardware, but I have to tell you, I have never had the hassles with any motherboard I have ever used that I have experienced with setting this thing up. I had hoped that I would actually be able to use the machine this month.

Anyone who can help me -- I'd really appreciate some input. Please!

Thanks
Herp

That did it. I had no idea this board would require so much time to figure out, but I guess it's a learning experience. Can you tell me what PIO mode is, as opposed to DMA?

Thanks for your help