Change location of Ubercart downloads file

I don't want to do this unless it is easy to do. And if you have done it or something similar before. I just can't find the answer on the [login to view URL] forums. I want to change the directory of where the files I sell are located. Currently they are located outside the web folder but still on my main site. But I want to host the files on higher speed servers (Amazon cloudserver or ???) and deliver them from there. I just don't know how much Ubercart code (if any) needs to be changed. According the Ubercart documentation, it can be either a relative or absolute path. Absolute would indicate this can be done, I just don't know if there are other code changes that would need to be made. Quint