OK, Mbogdasarian, here are two links to player-developed scenarios
May 1, 1942
Return to Wake Island
n01487477 has posted a link to a site that has multiple scenarios inclduing Marianas, 1944, Burma 1943 and Downfall.
Marianas 1944 is a good scenario, but it can be somewhat tedious at the beginning. You have to get all your convoys formed, troops loaded and set sailing. Remember to set your troop convoys to amphibious. You can spend hours just setting up your convoys and watching them. There are Jap subs in the area and invariably a convoy will site a sub and head back to PH.
What I've done to help me if I want to try variants or I manage to screw up the invasion or air battle is run the scenario 1 day at a time for 5-8 days until my convoys are all heading in the right direction, then save the game and get out of WiTP. Navigate to the WiTP AE folder, find the SAVE subfolder, and copy the .PWS file to another subfolder so you can copy it back at a later time.
The May 1, 1942, campaign is the most enjoyable for me. It highlights the tremedous risks the Allies were facing with very limited resources, while also bringing out the Japanese weaknesses in terms of supplies and transport. It also shows how China becamesuch a sucking chest wound for Japan.
As far as I know know there is no Midway scenario.
(Did you ever stop to think and forget to start?)