ER-101: Importing custom tables without an ER-102

I have an ER-101 only. Is it possible to somehow import custom tables (scales) without an ER-102? I was thinking that it should be possible to convert data from a CSV with the correct XML formatting and then paste it into one of my backup XMLs. Then save it to one of user tables. I am aware of course that it is possible to edit on the module itself, but I’d very much prefer to do it on the computer.

What logic / formula should I use when building up a Major / Dorian /… scale for example?

Any help would be much appreciated.