first I want to thank these who answer my first question, I did found a usefull information about UDMA ULTRA/66, I did found the patch to use in the FAQ, I did create a floppy boot disk and use the patch when I have the boot command, and when I continue the instalation I was able to pass the part asking fot the PCI controller but just after that it's give me an error after the part asking for a scsi controller saying that I have an error in my system, no idea how to solve that or what that mean???? that to be a newbie :0) so any help please, and try to go with small detail with me I have win98 Hard Drive Western Digital partioned to three drives 7.4GB each all are formated FAT32 Controller UDMA card Promise 66 ZIP Drive Iomega I have ASUS P3B-F bios version 1004 Intel PIII 500Mhz-100 FSB thanks folks