"find_pair" generates an input file in text format that you can edit to suit your specific need before feeding into "analyze" (or "cehs").
Just imagine the situation without access to "find_pair": how would you prepare (from a nucleic acid containing structure in PDB format) an input file for an analysis program such as Curves etc?
In the 3DNA homepage, I have also maintained
a list of citations to 3DNA compiled from Web of Science. It is not necessarily complete, but could serve as a good starting point to related published work.
So far, I've been the only person in answering questions in the forum. That's fine as a starting point. In the long run, I do hope other colleagues would get more actively involved: not only in asking questions, but also in answering them; moreover, in sharing your experiences, or contributing scripts/programs etc.
Your contribution can make a difference!
HTH,
Xiang-Jun