Multiboot using GRUB

[Yvo]

Guys, 
I read quite some articles but did not find a proper answer yet so I hope
one of you guys can help me out.
I am not sure whether this is a GRUB bug but I decided to post anyway, here
comes the story:


First config specs:
2x WD 36,4 Raptor SATA in striped mode on SIL3112A on board controller,
mainboard ASUS A7N8X-E Deluxe. 
On this RAID0 array Windows XP is installed and running fine, I do not want
to install linux there!

My other drive is a "good old PATA" hard drive, an Maxtor 80Gb DiamondMax8,
on which I created two PRIMARY Partitions, 1st one is 200Mb formatted as
EXT3 and mounted as /boot and 2nd one is EXT3 formatted 20Gb and mounted as
/ (root). Rest is extended, one formatted as FAT32 and one SWAP partition.
The FAT32 is mounted as /win

As said WinXP is booting fine but no way I can get FC4 started using GRUB
with System Commander 8.13. SC detects the bootable partition though but
accessing it displays either the message shown below or just:

1
GRUB GRUB GRUB GRUB GRUB GRUB GRUB GRUB GRUB GRUB GRUB GRUB GRUB GRUB GRUB
GRUB GRUB GRUB GRUB GRUB GRUB GRUB GRUB GRUB etc.

2
An error occured accessing the disk
Use Abort to issue warm boot

Description: general error occured
Access type: hard disk read

Disk error number: 01H Internal tag: 202
Drive E Head1 Sector34 Cylinder 0
Logical Sector 96


Also during install I did not initialise the RAID partition, so I did not
ERASE the array since WinXP was already running there and besides Linux has
nothing to look for on that array. However during install I did an advanced
config of GRUB bootloader and used the following settings:

/dev/hda2 /boot EXT3
/dev/hda3 / EXT3
/dev/hda6 /swap