SPOILER
That's about right, exept the Fuzzles don't kill Abe & Munch, they just wound the two of them very severely.
Then the Vykkers come in and kill Abe (you don't get to see this though), mount his head on the wall titled "LOSER", and take out Munch's Lungs for Maggie. Then they do the same to Munch as they did Abe, mount his head and title it "LOSER".
Oh, and an extra little thing that happens: When Abe & Munch are up on the wall, there are Mudokons looking up at Abe like "Thanks a lot buddie
" and Fuzzles on Munch's side doing the same. Then there are the Gabbit Lungs in a case, in the middle of them, all readied up for Lady Margaret.
SPOILER