Here is the translation. I couldn't understand a few words myself.
Alien: Well well well.. look what the flamin cat's dragged in. I always knew you'd be back Merv.
Merv: Flamin' hell..
Merv: G'day. Merv Bushwhacker. I'm a Jedi.
Rebel Guy: Get yer hand off it mate.
Alien: Wake up to yerself Merv, you've been away too long. Drongo's taken it all.
Merv: Bugger me!
Narration, not sure who is saying it..:
Darth Drongo. Trashed all the pubs and racked off with all the amber fluid. No bugger knows why he does it.
Let's stop buggerizing around fellahs, this bloke's really starting to brown me off.
Alien: I tell you what, I know these rebel blokes. You might have rocked up just in time to stick it to Drongo.
Rebel Guy: Get out of it ya mongrels!
Merv: We're goin in tomorrow mate.
Alien: We're gonna need more than you and that thing hanging off your belt to get us in!
Darth Drongo [I assume]: Mervin Bushwacker.. you no hoper. Look atcha.. hopeless!
Alien: She'll be right mate.
Alien: Yer a dead set spunk! [nice to see romance in this]
Narration: It's gonna take them all now, it's flamin over! [couldn't quite get this dialogue]
Alien: Sweet buggery!
Merv: It's cold! It's frosty! It's beautiful! Stop this and [unintelligble]
Merv: I have had a bloody gutful.
Narration: So what do ya reckon?
Narration: Aw yeah.