How do you set the map corruption level, science rate, etc when you use a custom map?

I did a couple tests and if i import a 100 x 100 map into the normal C3C ruleset, multitool savegame editor tells me it is using the tiny rule set.

EDIT: i did some more messing around and found that if you generate a random map other than the standard sizes, it uses the standard map size rules.

I'm guessing that since there is no way to tell ahead of time exactly which map size rules it is gonna use, the world sizes need to be edited to all read the same for whatever you want the map to be??

Example: you want to import a vanilla civ3 200x200 map into a custom set of C3C rules and you want the map to use Huge map settings for tech, OCN, etc. So you have to set all the tech rates, ocns, etc for each map size the same as the huge. That way it will use those settings even if it is flagged to use tiny map settings.

Does my question make any sense?

Is there an easy way to tell which world size rules are being used?