Keep losing Vista Aero & Basic themes

[turbodewd]

Im heavily tweaking my VistaSP1 installation but am puzzled as to why my builds are showing up with just the basic Windows theme, i.e no windows orb, instead i get the Start button.

ive deliberately left the settings on. On the Compatability Window I left on Aero and under components left it in there too.

What dependencies does it have? If there are any it doesnt prompt you about them if u remove them it seems.

Anyone got any ideas on my plight?