Hello cjcmetals -
Unfortunately, as noted, there is no way to add a profile to your listings via a .CSV.
Yes, using a profile on a listing that has data in will overwrite the existing data in the area for the profile you apply. So, if you have a blank item details profile and include it in a Master or apply it to a listing you are working on, it will change the Details area to match the profile. There is no profile setting where you could include the template and condition without the rest of a details profile.
- Craig