Removing Windows XP and Boot Menu

I was running Windows ME on my system and decided to upgrade it to Windows
XP. After installing Windows XP I noticed that non of my programs or files
were transfered to Windows XP. After rebooting I recieved a multi-boot Menu
asking what OS I would like to boot to. I have multiple drives on this
system C through H and when booting to XP the system only shows 2 drives, C
and D but when booting to ME it shows C through G. The only problem is that
When booting to Windows XP it states that the programs within Windows XP are
located on Drive D. Drive C being (D1-P1) and Drive D (Maxtor9). When
Booting to Windows ME the following drives are visible, C (D1-P1), D
(Max160), E ( Drv3_vol1), F (Music), G (Disk4_vol1). As you can see the
Maxtor9 drive is only seen when booting to XP. The question is... How can I
remove Windows XP and restore my system back to Windows ME with all drives so
I can upgrade it to Windows XP WITHOUT having a multiple boot system?

I have attempted to run the OSUNINST.EXE with out any success due to missing
registration information. Could someone please talk me through the process
of retoring my system and upgrading it properly to Windows XP (Home Edition)?
Any and all information that you can provide me with is greatly appreciated.

Thank You, R. Brown - Geneva, OH - USA