DDR/DDR2 HP compiler - multiple devices

The DDR core probably maps to IO primitives, which connect directly to their associated IO. So you can't split it and have it drive two. Since you don't actually want two controllers, just a single one that drives a wider bus, you should be able to configure it that way. (Plus, what you're doing would not work from a timing perspective. Having a singel DDR element take the time to drive two pins would throw off the timing quite a bit.)