Yes, it is possible for grub to boot Windows. LILO too, it can even boot Xen if you use mbootpack (otherwise it doesn't support initrd).
The point is that if you use Windows you must use its boot menu, and it's easier to configure it to boot multiple OS than grub or lilo. EasyBSD handles all the boot blocks for you. -- Sent from my Android device with K-9 Mail. Please excuse my brevity.