This detail of the requirement is clear. But what is not clear is how this translates to your business users. What business requirement are you trying to implement here by launching developer oriented rules in a user portal for your business users?
On click of link configure, launch local action and select as modal dialog.
1. In the pre processing activity of flow action, do the obj-open-by-handle of the rule you are trying to preview. You can get the inskey from your grid source page. Do obj-open-by-handle onto a page like RulePage or any page name.
2. In the Flowaction refer a section, in the section include another section with Name 'RuleFormLayout'. Load the included section using page and give the page name given in step1.
By this based on the page class, it will load the respective ruleformlayout and display the rule.