Booting from different hard drive?

[A+Net+MCP]

I have an age old question. I have been dual booting ME & XP. ME is on HD0 (c http://images.thetechguide.com/forum/public/style_emoticons/<#EMO_DIR#>/smile.gif\' class=\'bbc_emoticon\' alt=\'\' /> and XP is on HD1 (d:). I want to format c: HD0 and just use XP. I have copyied boot.ini, ntdetect and ntloader to d: and in boot.ini XP is the default OS. I want to confirm what to do next, I don't want to f*@ck up my baby. Do I just make d:the active parition. Will this allow me to disconnect Hdrive0 (c:) and boot from HD1 (d:) into XP. Is their anything else I need to do?

[A+Net+MCP]

OK I have disconnected C: drive and put D: in it's place (IDE1 master) I have made D: active w/FDISK. I have copied ntldr, ntdetect and modified boot.ini to d: I made a XP Boot disk which just has the above 3 files because this will garrantee me to get into XP. On D: drive I have an E: partition with XP on NTFS so I'm still dual booting and should get that screen. So when I try to boot from D: drive HD0 I get a invalid boot disk error. So when I put in my XP boot disk and boot from Floppy it gives me my dualboot screen and I choose the default XP Fat32 and I'm in XP fine. The 3 files on the boot disk are the same that are on D: because I copied them from A: to D: to make sure so why doesn't booting from D: work?