As usual with our apps, the scripting support is natural. Once you install Power Custom Field™, you can access the custom fields via the usual syntax: customfield_<id>.
The value of the field is always an array of KPOption representing the selected options in the field.
Example
//simple example on how to access (get/set) Power Custom Fields™ fields //we assume we have an issue context here KPOption [] options = customfield_12345; if(size(options) > 0) { runnerLog("First option id = " + options[0].value + " and the label is :" + options[0].label); } //we'll assume this is a multi-select field, because otherwise it will not work KPOption nopt; nopt.label = "Extra topping"; nopt.value = "99"; options += nopt; customfield_12345 = options; //here's the set