What's the most common limit for pentium 2/3/4 era boards? It seems like the most common one is 137gb, with no limits fro, 512mb up unless you're unlucky. Also does drive overlay software work for 160gb drives, and especially for ntfs/xp installs? The seagate one that Phil uses seems to only have fat and fat32 support, I'm guessing if I install the ddo then install xp, that the mbr will be changed and the system will no longer be able to boot from the oversized drive?

Just confused because I've been mainly using ide-sd adapters, and want to replace them with hard drives - but I can't get my hands on ide ones cheap, which is okay since I can get the adapters... but I'm also having trouble finding drives under 160gb. ATM I'm not using my under 160gb drives in case they're the only ones that will work on older systems, or will be the only ones to work with overlay software.