[boost] Naming of 32/64 bit libs

Hi, I need both the 32 and 64 bit versions of the boost dll's to coexist in the same directory. Currently when I compile boost, both versions get the same names, e.g. boost_date_time-vc80-mt-1_33_1.dll. Is there any way (apart from modifying boost-base.jam) to change this behaviour, so that the dlls get different names for 32 and 64 bit, such as boost_date_time-vc80_x64-mt-1_33_1.dll for 64 bit? Thanks. -- Anders