Here is the way to change the homekeys IN TFLO 3D.
In a registry editor, go to:
HomeLSKPath, which is the left softkey (Standard = Phonepad)
HomeRSKPath, which is the right softkey.
If you change these with the location of the programs you want to link to, and simultaneous change the names:
HomeLSKText = Left softkey text
HomeRSKText = Right softkey text.
Changing the boot picture/sound:
HKLM/Software/HTC/HTCAnimation (startup animation)
HKLM/Software/Microsoft/Splash Screen (The green WM 6.1 logo)