Replacing stages and .rel files

[SunkenGhostShip]

I'm having trouble adding the stages I want to my SD card.
I know I am putting them in the correct folder.
But I don't think the .rel files are working properly.
Should I just rename the file to the stage I want to replace?
Does that have anything to do with the .rel file?
I know the .rel belongs in the module folder.
Anything you guys could suggest?
Thanks.

[LegacyWolf]

Naming files properly is key. This depends on what stage you're trying to replace.