I see.. To me CFG USB seem to be running better than LoaderGX (I am korean, and Nintendo Korea has not released the WII_U officially, so It is always tricky to running Wii roms(Korea region) on Wii_U machine(US released)In order to achieve this it might be possible to pass arguments from hbl2hbc through USB Loader GX (which can take arguments/parameters) to launch a specific game. I asked this in the USBLGX thread once but it might be the case that it's impossible to pass something to the vWii mode.
I would better teach my children not to click any icon on Wii U
Anyway thank you for your considerable reply~!