Minimum requirements for Gmax and SBuilder

Pardon me if this is in the wrong forum but it is geared so much towards scenery design I thought it would get a better response here.I am on the road a lot these days and I see many hours wasted away where I could be improving my Gmax skills and working with projects I am creating also in SBuilder. So I was tinking of picking up either a cheap, new laptop or a used one soley for that purpose.1. For those who have used either Gmax or SBuilder on a laptop (notebook), do you think if I got one with say 512MB RAM it would suffice?2. What about shared RAM on the AGP card?I don't think the CPU is as important as these two questions as I would not really be gaming but designing. If I ran FS2004 it would be just for testing objects, models, so settings would be at a minimum. Of course I would try to buy the fastest CPU at my budget ($300-600) Don't care about dual-core for this or using Vista. XP Home or Pro would suffice.Mostly worried about large projects, like in SBuilder you could load up a ton of photoreal bmp's which could drag the system to it's knees... things like that I am most concerned about.Many thanks...