metrics,monitoring security in xMII and Scan groups

Hi all

How does scan groups work ? (e.g. 5MIN, 15MIN etc.) Can the user choose his own time interval, e.g. he wants to schedule something to be run every 25 minutes, but we don't want to define scan groups for every possible time interval, Can we let the user control and enter the time interval he wants (e.g. every 35 minutes etc.)?

How does security work in xmii with respect to metrics and monitors. If the user is given access to this metrics screen so he can create his own metrics, what kind of security is required and is there any issues if we do it ?

I believe the metrics and monitoring are stored in a database, whatever database we specify when installing xMII ActivePortal. Please let me know into how does it get stored. Can we manually add/change information in those tables to create own metrics instead of going through the xMII metrics screen.

i want to understand whether we should give the users xMII screen to maintain themselves, or we need to build something customized

thanks

Veeresh