use a arduino to program a another arduino?

Hi

do anyone know if it is possible to use a arduino decimala to program a arduino from the ardunio environment clone that doesnt have the usb port? without that the software gets burnt in to the first arduino.

infact i just want to use the arduino as a usb to ttl serial interface and not effecting the hosting arduino?

Yes, you can do, have a look at the following links

http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1165363464/6

http://www.geocities.jp/arduino_diecimila/bootloader/index_en.html

ok thanks for the tip.