how to make better use of native tools

Hi, I like using macports to get some stuff with lots of dependencies installed. I wonder though why it is neccessary for example to rebuild native tools such as python and perl. Because it tends to cause quite a bit of confusion to have several of those around including severel "site" folders created etc.. Now wouldn't it be possible to have proxy packages such as fink has? I.e. python24- native? It could then be an option. Dunno if macports can handle options like that, but it woul shure be nice. Best Daniel Oberhoff