There were instructions on how to do this with 2.0.4 that may still work.  It is a small modification to Config.pm.

http://lists.otrs.org/pipermail/otrs/2006-September/012276.html

Let me know if this actually works with your version.

Marty

From: Jean BROW [mailto:everydaywow@gmail.com]
Sent: Thursday, March 21, 2013 11:02 AM
To: User questions and discussions about OTRS.
Subject: [otrs] Closed tickets

Hello,

Anyone know how I can re-open an ticket that are closed?