LinuxQuestions.org - Dual Boot FC4 XP on Asus P4P800 Mobo

My system has XP installed on SATA RAID disks using the Asus P4P800's ICH5R chipset (and software RAID implementation). It is (at present) not directly accessible from my FC4 installation which is on a separate HDD. I can see (read/write) all contents of the FC4 HDD from XP.

Dual booting doesn't seem to work, so I have to boot FC4 from a grub floppy.

I have tried all the usual methods. Using bootpart I can see all partitions correctly and can install the bootpart .bin file under XP without trouble. Only problem is that it won't boot - when I select the Linux bootloader entry from the bootpart menu it just returns me to the menu.

BOOTPART shows:
D:\Archives\Windows Archives\WinXP\bootpa25>bootpart list

Add partition in the Windows NT/2000/XP Multi-boot loader
List entry in BOOT.INI
0 : multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /fastdetect /NoExecute=OptIn

By runnning "bootpart REMOVE <number>"
where number is an entry number, you can remove the entry from C:\BOOT.INI

D:\Archives\Windows Archives\WinXP\bootpa25>bootpart

Add partition in the Windows NT/2000/XP Multi-boot loader
Run "bootpart /?" for more information

Physical number of disk 0 : 6b3c6b3c
0 : C:* type=83 (Linux native), size= 7164958 KB, Lba Pos=63
1 : C: type=f (Win95 XInt 13 extended), size= 2474010 KB, Lba Pos=20482875
2 : C: type=82 (Linux swap), size= 1052226 KB, Lba Pos=20482938
3 : C: type=5 (Extended), size= 1421752 KB, Lba Pos=22587390
4 : C: type=b (Win95 Fat32), size= 1421721 KB, Lba Pos=22587453
5 : C: type=83 (Linux native), size= 3076447 KB, Lba Pos=14329980
Physical number of disk 1 : 7f797f79
6 : D:* type=7 (HPFS/NTFS), size= 51199123 KB, Lba Pos=63
7 : D: type=f (Win95 XInt 13 extended), size= 105097230 KB, Lba Pos=102398310

8 : D: type=7 (HPFS/NTFS), size= 51223221 KB, Lba Pos=102398373
9 : D: type=5 (Extended), size= 53873977 KB, Lba Pos=204844815
10 : D: type=b (Win95 Fat32), size= 53873946 KB, Lba Pos=204844878

D:\Archives\Windows Archives\WinXP\bootpa25>

Can anyone help?