This is a good question because i suspect people often want to change the way plugins are triggered.
you would need to do 2 things:
1) go to options,plugins, plugin manager, select the plist plugin and then override the trigger for printer list to something else, maybe like p2list.
2) then go to aliases, select myaliases file which you can edit:
and add a new alias named plist,
set regex to ^plist(.*)$
and in the results put
dosearch p2list$$1 +sall
i think that will do it. it's off the top of my head so if it fails let me know.
there are other ways too -- nitrix is really good at coming up with stuff so maybe he will post a reply too.
but the basic idea of my method is to rename the original and then use a dosearch action to make one thing typed act like another.
Having said that:
We should ask taichi to make the printerlist plugin always display all results. he can do that but probably just doesnt know how or it didn't occur to him.