I'm new to this forum, and I need a little help/advice.

My parents were recently given an older (ancient might be the better word, LOL) computer. Since this is thier first, we thought it would be fine for them just to learn on. Anyway, it has a Pentim I-166 processor with 128 MB RAM and is loaded with Windows ME. When they got it, it didn't have a sound card or a modem, so my brother went out and got them one of each.
Because of the computer's age, the sound card had to be a 16 bit, so my brother got a Sound Blaster 16, by Creative Labs, and the modem is a US Robotics 56k fax modem.
Anyway, the modem installed fine, but during the sound card software installation, he says he got about 90% through the installation, when all of a sudden that "dreaded blue screen" appeared. It's blank with nothing on it, but he says you can see the cursor, and move the mouse, but nothing more.
He's tried to restart the computer, using a variety of methods (the power switch, the reset button, etc.) all to no avail. He says when the computer starts up, he gets the "Energy Star" screen in DOS, and it detects all the settings, etc., then it goes to the Windows ME startup screen, but then it reverts right back to the blank blue screen.
Can someone please advise me here? I'm not sure what to tell them to do next. The guy who gave them the computer also included a copy of Windows ME, but they have no start-up disk, that I'm aware of. I'm trying to help them long distance (I'm in MI, they're in FL), so I have to talk them through everything over the phone. Isn't there a way to reach the safe mode from the DOS screen at start-up that will let them finish the install, or even to re-install Windows ME?
Any and all help, advice, etc. is most appreciated! Thanks so much in advance!
Hugs,
Renι