gecko code help *button activator related*

[somen00b]

So I'm trying to set this code to a button activator as part of a project:

4A000000 90180F08
14000054 04000000
E0000000 80008000

The code forces a specific assist trophy to spawn when an assist trophy is used, but I want it to only be aplied if you use a trophy while B is held down. Basically, I want this code set to an activator.

I've tried copy & pasting the acitvators from other codes, no luck there.

Normally I have experience with this stuff from hacking GCN AR codes and such, oh well.