Use A Nectar And A Queen On A Combo Bench.
- After You Give Katey Her Zombrex For The First Time, Sullivan Gives You The Maintenance Key
- Maintenance Key Gives Access To Rooms WIth Combo Benches
- To Make A Nectar, Combine Two Orange Juices In A Blender
- There Are Blenders At The Americana Casino Bars
- After You Give Katey Her Zombrex On Day Two, Queens Appear.
Combo Weapon Is "Wingman".
(I Looked It Up When I Was A Kid, Not Sure If It Tells You In-Game How To Make This)
Good Luck!