Hi Snowwy, try this..

Put this in Remote Scripts Editor (Alt + R)

If the page isn't blank, press File > New.

Code:
On *:Start: {
  server the.server.address1 -j #Chan1,#Chan2,#Chan3
  server -m the.server.address2 -j #Chan1,#Chan2,#Chan3
  server -m the.server.address3 -j #Chan1,#Chan2,#Chan3
}


All the best,

-Andy.