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I used PE2USB and a Bart CD (which works fine on all PC's I have tried it on). The PE2USB 'Make' works without errors, as does the first boot, but if I then take the Flash drive to a different type of PC I get the BSOD 7B. Put it back to the original type of PC and all OK.
To Me it looks like the standard XP problem of trying to use a HDD on different Hardware??