The OTS is part of the style file. Consequently, when that style is selected, and the OTS link is on, the default OTS will be activated. When you select an MFD file, the OTS link is automatically turned on when that style is selected.
In your case, with the limited memory available on the 2100, I suggest creating a bank of registrations that just selects specific voices. Each bank of 8 registrations will provide you with 16 voices (2 per registration).
Another option is to copy specific voices that you regularly enjoy using to the User Voice area. When this is selected, 10 voices will appear per page and you can select any of them with a single button push.
Hope this helps,
Gary
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Travlin' Easy
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