[rules-users] Firing of specific rules

Hi I am using Drools 4.0. First time I want to fire some specific rules from my rule file(in .xml format) and then other rules for the second time. I have defined agenda-group attribute for the rules as follows: <rule-attribute name="agenda-group" value="Check-rfq"/> how can I execute specific rules using agenda group or is there any other options are available. When I had gone through Drools documentation ,they mentioned Listener api can be used to execute specific rules but I did not find enough information on Listener. Please let me know how can I implement Listener api to execute specific rules. The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com