Thanks, it worked.
I wasted 3 CDs though. One of them was because I didn't make it boot-able.

Thanks for the quick reply!

I'm pretty sure it's IDE, which means PATA, right? So from what I understand, you're telling me that the HDD driver on the ReactOS CD might not be the right one for what I'm using? That makes sense. Where do I get the drivers to replace uniata.sys and atapi.sys?

I'm trying to install ReactOS 0.3.11 on my old Pentium 4 desktop computer. I've booted from the CD to install it, but when I got to the partition page of the installation, no partitions appears in the list. If I press enter, it brings me to a screen that tells me ReactOS has been installed unsuccess...