[Q] Wondering how the Superuser app behaves

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http://forum.xda-developers.com – I was working with my TF201, and I figured out how to get the su binary on it, and executing, but simply being denied permissions. I was wondering if it had anything to do with the fact it's in /data/data/jackpal.androidterm/shared_prefs/kbox/bin/ (I used a guide on how to install common UNIX tools to Android), and my thinking is, if you could set a custom path to su on the Superuser app, and point it to that directory, you could achieve su permissions for long enough to copy the su binary to /system/bin/. Would this work, or am I not understanding the way the superuser app works? (HowTos)