Certainly is possible mate, open your mIRC script editor. (Alt + R) and press File > New if the page isn't blank for a fresh new page.
Paste in the following and click "Ok".
On *:Start: {
server server.one.address
server -m server.two.address
server -m server.three.address
server -m server.four.address
}
Hope this helps, good luck.
