How to add multiple asterisk server in vicidial

Hello friends

I am newbie in asterisk and vicidial . i installed vicidial server version 2.6-375a. as ubuntu 8.04 as operating system. now the asterisk , vicidial and LAMP are running in one system . so i like to install asterisk in another computer and its pointed to vicidial server (without replace the existing one) is its possible ? how can i do this task ? if is it possible then can i change asterisk version 1.4 to 1.8 ?
please help me