Well, what exactly are you trying to accoomplish? Was it a virus or a trojan? How did it get there? Are you wanting to run IDS, IPS, CBAC? Do you have a need for VPN's? More importantly, do you have Cisco SDM? This is a GUI based configuration tool that can guide you thru---the ASA's I believe have this built in.
If you need additional help, email me at burt_bees@yahoo.com
Burt