Its important to note that there should be no Intuition window.requestors opening before cgx is started(ie before boot screen). If anything opens a requestor in error or whatever, it will break the boot sequence.
If your running ppc datatypes be sure that the bvision video address is correct in WarpOS prefs. Since datatypes are generaly started right after the monitor drivers, its possable its stalling at this stage due to incorrect vid addy. E0000000 is for bvision and should be forced.