[KaleunMarco]

Originally Posted by propbeanie

It all involves the scripted groups' line of "EvolveFromEntryDate=true" in the campaign, for the groups to start when they are supposed to. In the Single Mission files, you will see that the groups are much closer to the point of the battle, like the player's sub is, so those lines are usually set to "EvolveFromEntryDate=false", because if they were set to "true" in the Single Mission files, then the groups would be gone by the time the player gets there.

With Random Generated Groups (RGG) in the campaign, it just involves getting the "DelayMin=", "DelayMinInterv=" and "SpawnProbability=" (usually 1, 1, 100) lines correct, and in co-ordination with the "GameEntryDate=" and "GameEntryTime=" settings, along with "MaxInst=" (usually 1) and "MaxUnitsCreated=" (however big the group is) settings. This is where lurker excelled, in being able to make an RGG show when he wanted it to. It is also why the Mission Editor (ME) will ruin most of the settings lurker did, in that the ME has its own ideas of what is valid for those RGG settings, and even the regular scripted groups, which makes it frustrating to work with them...

as PB has explained above, re-creating a specific set of ships to appear at a specific date/time/location is nearly impossible given the design of SH4 and the dotMIS files. the Random Generated Groups have parameters (listed by PB) that are keyed to the start of a date within the MIS and not the start of the actual career/mission date range. a lot of moving parts to coordinate.
one thing you can try is to create an RGG within one of the existing dotMIS files that is enabled for the June 1942 time. (42a_Jap_TaskForce.mis?)
The key parms are GameEntryDate, DelayMin, AvailStartDate,Long,Lat.
Construct the RGG to start at the coordinates you want, on the date you want, sailing in the direction and speed you want such that it arrives in the general area of the Battle of Midway. try it with one or two ships in the RGG until you get the parms the way you want, then add more ships. it's a snap!

i tried it once a long time ago and could not make it work. i think i had too many parameters from the copied RGG and it was screwed up because of it. never went back to it.

anyway, good luck.