Yes it is possible.
If you are good with software and are a do-it-yourselfer, check out the the instructions by Karl Irvin (a QuickBooks 3rd party developer} at http://www.q2q.us/How%20to%20start%20a%20new%20QuickBooks%20file.htm Karl develops and sells the tool you need to start a new file with 2 years of data, and they are inexpensive.
If you aren't a do-it-yourselfer, you will need to hire someone who specializes in this type of service, check out either of these websites
http://www.qbornotqb.com/services.html
Or
http://quickbooksusers.com/file-shrink.htm
OR
http://bottomline-sb.com/home/index.php/page/home_page
All of the people/websites mentioned are reputable.
I hope this helps.