vertex-II configuration architecture

I have a question about Virtex-II configuration architecture. Any help/pointers would be greatly appreciated. Thanks, Sudarshan problem: according to XAPP 151 (vertex config architecture user's guide), each CLB column in Virtex has 48 frames So, XC2V2000 (56 rows 48 columns), should have at least

48 * 48 = 2244 frames however, Virtex-II platform user's guide (v 1.8, page 309) says there are only 1456 frames. So, it seems Virtex-II configuration architecture is different from Virtex configuration architecture. Unfortunately I have so far not been able to locate any document specific to Virtex-II configuration architecture