Power Book For Live Performance, " Ivoiry Piano " best config ? Options

[SOUKOUSS]

Hi all,

I will make a Tour in France in june / july, and I'd like use the Ivoiry Synthogy on stage.
What is the best config I need to have ?

Is the following a good idea ? :
Power book 15" processor 1,5 or 1,67 ? with 1,5 Gig RAM
HD firewire, for the Ivoiry install folder
RME fireface

What is the best linkink of the sound card and of the Hard disk ? The both on the same FW800 port ( in "chain mode ") or one on the FW400 and one on the FW800? And which one ?

I have already a Maxtor Firewire 250 Go /16 Mo cache with 150 Go free
Can I use it for Ivoiry, or need I use one HD only for the ivoiry ?
If I create a partition on my Maxtor, is it as good as have a dedicated HD ?

Thank you very much guys for reading me, and your answers !
BYE

[iShawn]

I am not sure to have understand your question... but :

I have always heard saying that there is a easy way to "chain" many firewire devices, like a hard drive and a sound card, both plug into the same FW port. Less using a HUB.
Your devices must have two FW ports. If So, you just plug the 1st device ( hard disk for example ) into the FW port of your computer, then use the second free port of that device, to connect on the second device ( a sound card ).
Same way to connect a third device to the second, etc.

By that way you can have many devices on the same FW800 port of your computer, less using a HUB.
Am I wrong ?

Would the speed be the same for all of them, as far as transfer rates and such?