i was going to say... the Multi-Textureing isn't in the truest sense, and they use the DirectX Engine rather than the APi to produce the results (which is why they're GeForce Hardware only)
the technique is possible to reproduce through memblocks, however i'm not going to say how - because oftenly that just leads to more questions because people can't figure out what i mean ... so just work in it on your own.
Tsu'va Oni Ni Jyuuko Fiori Sei Tau!
One block follows the suit ... the whole suit of blocks is the path ... what have you found?