Nessus capabilities and plugins

hello guys, got a couple of questions here about nessus, my OS is Ubuntu 7.10.

i am using Nessus 3.2

1. is nessus capable of calling/executing perl scripts and make nessus do all 
the reports?
2. is this the right way to add my own nasl script? coz it wont show up in the 
client sometimes.
        - /etc/init.d/nessusd stop
        - nessus-update-plugins -v
        - /etc/init.d/nessusd start
       -reconnect client

3. is there a one liner command to add just 1 nasl plugin?

4. when i revise my nasl script, is this command enough for the changes to take 
effect? 
     - /etc/init.d/nessusd restart
    - reconnect client

    I'm confused with the NessusClient coz it wont update regularly(the 
plugins). For example, i already managed to add my nasl plugin
and yes it did show up in the Plugins tab. I included my plugin during the scan 
and it worked fine. 
But when i tried to revise my script (i changed the output message of the 
plugin). No difference, it still prints the old message in the report...


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