Basically a creamsicle is an amelanistic corn/emory hybrid. All offspring from a hybrid are hybrids. Genotypically, treat it like an amel.
Assuming that none of your animals are carrying any genes we don't know about, you'd expect the following:
Amel (hybrid) x Snow
= Amel x Amel/Anery
= Amels het for anery (corn/emory hybrids)
= "Creamsicles" het anery
Amel (hybrid) x Ghost
= Amel x Anery/Hypo
= Normals het for amel, anery, and hypo (corn/emory hybrids)
= "Rootbeers" het amel, anery, and hypo
Or, if you wish to use symbols:
a<sup>a.</sup>a<sup>a</sup>, An<sup>+.</sup>An<sup>+</sup> X a<sup>a.</sup>a<sup>a</sup>, an<sup>a.</sup>an<sup>a</sup> = a<sup>a.</sup>a<sup>a</sup>, An<sup>+.</sup>an<sup>a</sup>
a<sup>a.</sup>a<sup>a</sup>, An<sup>+.</sup>An<sup>+</sup>, H<sup>+.</sup> H<sup>+</sup> X A<sup>+.</sup>A<sup>+</sup>, an<sup>a.</sup>an<sup>a</sup>, h<sup>h.</sup>h<sup>h</sup> = A<sup>+.</sup>a<sup>a</sup>, An<sup>+.</sup>an<sup>a</sup>, H<sup>+.</sup>h<sup>h</sup>