try this too from your mobo cd. I posted this months ago for a person having problem like you. it should work from the maxter cd too. only pay attention to the flast part of the names.
My mobo didn't come with floppy. here are my instructions from notepad
If you lost your Driver Disk labeled as "Promise 376/378 Driver"
This file will teach you how to make one Driver Disk
First please perpare one formatted 1.44M Floppy
Then please copy necessary driver from MSI Driver CD
- Driver for Win98/ME
Please refer to Win98-ME.txt
Please Copy CDROM:\IDE\Promise\S-ATA\PDC20378\Driver\Win98-ME\ folder
I got it working, it needed the ULsata from the maxtor cd and the txtsetup.oem file from the promise folder. Thanks for all the help! If any other problems occore I'll post it here.