Hello.
you write:
Sources can be distributed under GNU PUBLIC LICENSE for educational purpose.
But this is wrong. GPL cannot restrict its usage to only educational purpose. GPLed softwares can be used for business and any other purposes.
---------------------------------------------------------------------- ~o o~ OKUJI Yoshinori okuji@kuicr.kyoto-u.ac.jp s ) http://duff.kuicr.kyoto-u.ac.jp/~okuji (check "okuji.asc" !)