You're going to need more than 1 gig. You're also going to need around 256 megs of ram. I've got the updated tools (cd's came with V5R2 upgrade, I'm guessing that's what you've got.) I can't install them on my old pc at work because I don't have enough ram. I'm trying to sell my boss on the idea of buying me a new pc with a minium of 12 gig hard drive and at least 512 megs of ram. The Code/400 designer takes up a LOT of ram. Also, when you install Code/400, it installs ALL of the tech manuals you'll need to program in RPG (any flavor) COBOL, and any other language that IBM has a compiler for. That's why you need a lot of disk space for this tool.
RedMage1967
IBM Certifed - RPG IV Progammer