a) MassStorage: nearly always run the BASE B) Chipset, Graphics A+B, Sound A+B: sometimes run the BASE c) CPU, LAN, WLAN: never run the BASE It's very logical: a) has very often updated changes for txtsetup.sif/dosnet.inf, B) has the Intel Inf drivers and control panels, which are also updated sometimes, c) no extra entries whatsoever: just copy/paste.