Well, spacewise, we would be having some extra weight for sure but FL uses 22.050 mpeg3 codeced pci sounds (its the reason of their terrible sound qualit btw) and they hold really low hd space. I will try to improve the quality as much as I can and I will risk of having like 40-50% more discspace used for it (50 percent seems high but it means like increasing the total size by 20 mb or so:))
HD rig is a rip off for high budget studios, no need:D. Program itself is a masterpiece though especially for editing.
BTW, ever tried using Vienna Symp or East West over a 1 gb amd 5200? It rocks, I managed to make 3 instruments run at the same time before getting a blue screen of death lol.