TOPIC: event archive

hello, I'm new in dt register but in my company used dt register for joomla 1.5 and now I do a new site in joomla 2.5 and I have bought a latest version! I have some questions.

1) in the DTregister, when I close an event and I click the button archive where users registered? how can I retrive it?

2) Now I have 2 DB with 2 DTregister version, how import all the database from joomla 1.5 (db1) in joomla 2.5 (db2)??

Thank you for responce!