F16 install with 512Mb?

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http://forums.fedoraforum.org – Like the title says: is there a way to install F16 with only 512Mb? I am booting via pxe, with the full F16 DVD available via NFS. The vmlinuz and initrd images copied over by tftp are from that DVD. The boot works fine, and I get to anaconda, which puts up a text screen box saying I need 768Mb. I have read several other posts that for people using the liveCD install, they can change an anacoda file to skip the memory check (or set the memory limit to 0). But doing the install from the full DVD, I don't see how to do that. Is there a boot line parameter that I can put in the default.c (HowTos)