module based partial reconfiguration questions

Hello. I am trying to do a partial reconfiburation design on our virtex2 pro board. But now instead of a suggested topview and several modules hierarchy as the xpp290, my current design has a 3 layer hierarchy: a topview, with several modules, then for each module, it may contains one or more submodules. And where I want to carry out the partial reconfiguration is on the bottom submodules. So my question is whether i can do the partial reconfiguration with such hierachy? or I have to stick to the suggested modular design strategy. If can, then how to treat the middle layer modules when run the ngdbuild? do I use the parameter of -modular initial or the

-modular module -active. thank you.

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Heng Tan
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