Help To Load 2011

The issues I have on a new to me system as i currently run WHS2011 on aold laptop.

I have through work managed to get a Dell poweredge 1850 blade server the issue I have is the system discs are only 32GB and these are in a Raid 1 array.

So the story so far,
I have set up the array so it as one logical drive
The system boots to the DVD drive (I changed the CD drive for a spare DVD I had)
This will load the set up screen I can load my drivers for the Raid and it will see the drive.

I have tried the config file route with now lock and have done lots of goggling and have tried a number of different settings in the config file all with errors namely disc sizing

I then tried the Shift F10 on the set up screen and changed the setting for hard drive to 28GB and I get errors again over the disc sizing.

Not sure what to do next????

just to be sure things were all Ok I have loaded Windows 7 64 bit and this all loaded quickly and easly.

I have just tried to load WHS V1 on as may be this would have worked and no joy as it will not support Raid arrays on the system disc and the drive is to small.

S please help me I know it would run once I have it loaded as my current system is running on a smaller C drive as I tried this out on my laptop and this is running on a 25GB C drive.

Any ideas or suggestions welcome.

Thanks.