See Installing Xen Kernel Headers Guide at the VPSLink Wiki

Install Xen kernel headers:
Code:
curl http://mirror.vpslink.com/xen/xen-headers-`uname -r`.tar.gz | tar -zxf - -C /
Install Xen kernel modules:
Code:
curl http://mirror.vpslink.com/xen/xen-modules-`uname -r`.tar.gz | tar -zxf - -C /
Install Xen fuse module:
Code:
curl http://mirror.vpslink.com/xen/xen-module-fuse-`uname -r`.tar.gz | tar -zxf - -C /
depmod -a
modprobe fuse