Tip: Switch palace switches normally disappear if you replay the level. However, if you insert them as direct Map16 and use the hex edit at $00EEB2 in the ROM map, you can replay the level without a problem.
Use the custom import section in SM64 Editor and create a new custom import. Put in 00219C5C and 00219C64 as Pointers and put in 8040364C as Import RAM offset. Last thing is to put in 120364C as Import ROM offset. Leave the other two blank. They don't need anything. Have fun with importing new models for the stars! I'd like to see what you have imported when you do so!