I'm running KSP Interstellar extended along with Interstellar Technologies, Galaxies Unbound, all of Near+Far Future Technologies, and Cryogenic Engines. However, one of Cryogenic Engines' engines. the Tyrannosaur, requires LiquidMethane+Oxidizer. CKAN says KSPIE requires Interstellar Fuel Switch, but IFS seems to override B9 Part Switch's fuel changing. B9 Part Switch has an option for LiquidMethane+Oxidizer, while IFS does not. I want to use the Tyrannosaur, what am I meant to do?

I suggest you manualy add the desired configuration to the file that affects the storage tank.

How would I add said configuration? On the forum page, it shows a configuration that seems to be tank-specific, while I would like to add this for all tanks. That configuration also does not demonstrate how to create a tank that stores more than one resource.

In order to Change the generic LFO tank configuration, you need to modify IntegrationLiquidFuelOxidizer.cfg. more specifically you need modify InterstellarFuelSwitch (either the IFS only or Interstellar version). make sure every ; list is extended