Roman identified two tracks I've been wondering about for a long time: "Samoa Hotel" by Salvatore Assenza and Franco Zauli (which plays in "Something Smells") and "Men of the Sea" by Peter Hope (which plays in "Krusty Krushers"). Unfortunately, neither of these tracks seem to be on the APM website, although "Men of the Sea" can be heard here. Still, it's nice to have these identified. Thanks!
EDIT: Roman also identified "Steel Guitar Rag" by Herbert Wallace as playing in "Bossy Boots." This track is no longer available on the APM website, but a performance of it can be seen here. Thanks again!