I have made a small change to the released version of E2B v1.A1 before I make it live on the E2B website.
It now has a new version of SWITCH_E2B.exe (which you may find useful if you are into dual-partition image sorcery!).
This new version will prompt you to enter a partition type number for the second partition image, if SWITCH_E2B does not recognise the partition type of the second image file.
Previous versions of SWITCH_E2B would have set a type number of 0 (no partition).
This new change means that you can switch in dual images (e.g. HighSierra.imgPTN + HighSierra.) and set the second image to be an ext partition or HFS partition, etc. so it is visible to an OS.
This means that you do not need to boot to the CSM menu first so that the CSM menu code sets the partition type - thus you can use Switch_E2B to switch partitions and then UEFI-boot immediately.
It now has a new version of SWITCH_E2B.exe (which you may find useful if you are into dual-partition image sorcery!).
This new version will prompt you to enter a partition type number for the second partition image, if SWITCH_E2B does not recognise the partition type of the second image file.
Previous versions of SWITCH_E2B would have set a type number of 0 (no partition).
This new change means that you can switch in dual images (e.g. HighSierra.imgPTN + HighSierra.) and set the second image to be an ext partition or HFS partition, etc. so it is visible to an OS.
This means that you do not need to boot to the CSM menu first so that the CSM menu code sets the partition type - thus you can use Switch_E2B to switch partitions and then UEFI-boot immediately.