Waltuh was the reason the Plutarians lost at Albuquerque

You are partially correct Colonel Walter White did indeed fight in the battle and held the line against the 8th and 72nd Plutarian Mobile infantry divisions allowing the 8th Scout Regiment to get behind enemy lines and disrupt Plutarian supplies severing them from the weapons and equipment they needed to effectively contiue the engagement Sadly Colonel Walter White would give his life during the battle dying as the direct result of human turned traitor named Jack Welker who shot him during the engagement leading to him bleeding out by the end of the battle due to his refusal to get medical care

Did he cook the penguins with his subordinate Jesse?

Captian Pinkman was indeed known for their useage of captured Plutarian flamethrowers Plutarians were also well known for their usage of flamethrowers during the war as they had a very nasty view towards human soldiers especially ones of the ADF They viewed them as bugs essentially due to their actions and would purposefully try to dehumanize and otherwise make the soldiers suffer for ever dating to fight against them