Would you please stop with that impossible vs. impractical talk ???? You're filling up my mailbox with matters that should be discussed elsewhere. PLEASE STOP WASTING EVERYBODYS TIME -- +-------------------------------------------------------+ | A. Miguel Melo Esteves | | Departamento de Electronica e de Telecomunicacoes | | Universidade de Aveiro | | 3800 AVEIRO | | PORTUGAL | | +351-034-370200 ext 3025 | | etamme@zeus.ci.ua.pt | +-------------------------------------------------------+