fedora core 5 stock xen kernels nvidia drivers....

Doea anyine know when the stock fedora xen kernels will be compatiable with the nvidia binary kernels?  I have read some posts on nvnet and ther are some ways listed that allows you to do it, but it would be nice if the stocked ones provided that.  Also, the current stock Xen kernels do not allow you to "hide" pci cards from dom0, saw a post that mentioned it was turned on during th compile.  Thanks.