If I have a tune from another tuner can you add features to it?

Short answer: No, we would need to replace the entire tune.

If you have a tune from another tuner then the file is locked to the person who wrote the entire tune. Tuners spend hundreds if not thousands of hours building their tunes and testing them in the world. EcuTek protects their work and we cannot open them to add any features. If you would like additoinal features, or another "map" loaded into a tune you would need to have us start from scratch and use your tunes. Not only that but we would hate to add a feature to a tune we did not build and there be a conflict and the car have an issue. If we didn't write the tune we wouldn't be able to support it when there is an issue.