Create Customised Reports

I've been searched really hard, but the resources are very limited.

A few things I am struggling at the moment.

1. How to create a customised table reports with those datapoints ( not the graph reports )

I saw some very old threads, which is to run zendmd then check the data variable/value associated with one device, I found something like TotalMemory, which is static to a device, but didn't get any luck there to dig out some simple stuff which is returned by snmp , such as memory utilisation, cpu utilisation etc.

2. when a proper report template is created, how to schedule it to run, let's say every day or every month

3. How to create a generic report template then use filter to run for specific group

For example, create a generic linux server performance report, I want it to run against different device groups, in my set up, I use device group to organize customer device portfolio.

Any helps is appreciated, I did lots of commercial monitoring tools before and just recently dive into Zenoss, I have been enjoying it so far, but the most painful thing is the documentation, which drives me little bit crazy.

Thanks guys.
Hubery