Hi,
I have a dual boot pc with gentoo linux and Windows Vista with 4 gb of ram. I currently use the linux boot loader: grub. I need to know how to enable pae for windows from the boot loader.

My configuration is as follows:
CPU: AMD Phenom X4 9750
MB: MSI K9A2 Platinum V2
RAM: 4 Gb
VIDEO CARD: Geforce 8800 GTS 512

I enabled from the bios the support for 4 GB of ram (through an option called memory hole address if I remember correctly). Now I have read how to enable PAE for vista, but it uses a parameter at boot and bcedit makes changes for the windows boot loader, but since I'm using grub PAE isn't loaded.

Thank you!

Nothing to do with grub - use bcdedit to set the switch. That's a Windoze program.

Yes, but using bcedit makes chabges to the windows boot loader and I'm not using it, I'm using grub to boot into windows.

Wouldnt you still use bcedit even with grub, as I'm pretty grub chainloads (ie grub first, then windows boot loader second).

yes, grub chainloads the windows bootloader. Take a look at your /boot/grub/menu.lst file, DON'T modify it, you'll see the entry for windows specifies a line like:

or something like that. So use bcdedit to edit the windows bootloader. I dunno why you're trying to enable pae in windows tho, you shouldn't need to do that?

Ever Thought of using a virtual machine?

They get rouand most of the problems and are really flexible