Look at this recording it explains the basics of UnDP, especially table pollers starting around 6min50sec and how to combine multiple tables to create a mutli column table starting around 10min00sec
As far as your alerts, use the Advamced Alert Manager. Good tutorial here: Alerting resources for Orion Platform products - SolarWinds Worldwide, LLC. Help and Support
It shows an advanced alert based on std interfaces, but you can also create an alert based on your Customer poller, as showed here:
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Had the same issue and the link provided by fcaron no longer had the information he referenced.
After a little digging on youtube I found the right video: