I've been using Mirage (Master Edition) for almost a year now. Installing custom icc profiles in Mirage are fairly straight forward. For example if I want Mirage to use my profile for Canson's EditionEtchingRag, I need to know what the base media for that paper is, and also know the location of the icc profile on my computer. Canson's documentation says the media settings for that paper is "VelvetFineArt Paper", that's the base media. Now, start Mirage then...
- click on Settings->CustomMedia
- From the next window click on "Add medium"
- Select your Printer model
- Select your base medium - "Epson Velvet Fine Art" in this case
- Give a name for your medium
- Click the browse button next Normal or High quality and go to the location of your icc profile and select it
- You're done