Hi, Chuck...
At this link
http://www.ju88.net/otherprojects/he111p/finished.bmp, you can see an actual restored He111P in Norway, the basis for Revell's 1/32 kit. Having built the kit, I concede they are offered as four, long separate doors. however, my belief is that the doors were separate and completed the kit as such, as per my photos below.
Hope this is helpful.
Regards,
Paul