Generating complex custom reports?

I'm trying to figure out how to generate a report that shows me which workstations do not have a particular piece of managed software installed on them (in the first case, our antivirus software). We have several pieces of software that should be installed organization wide, and I want to use reporting through ServiceDesk to audit it and ensure that they have the same versions installed and nobody is missing the software.

Right now, I've tried to do so through the custom report interface and it appears that it only allows you to use one category of information. I do see that an option is available to do an SQL query to generate a report, but as I just recently set up ServiceDesk I am not familiar with the table structure.

Any assistance would be appreciated.