Apologies for the missing documentation. I thought I had already written this. However the process is quite simple, you can follow these steps:
Install RO Payments
Install the RO Payments - RSEventsPro plugin
Go to RSEventsPro
Click on Payments Integration in the right menu
You will get a list of payment methods and RO Payments/JD iDEAL is there as well
Click on plg_rsepro_payment_jdideal_title
Here you can configure the settings. Most important here is to select the Profile you created in RO Payments. When a user completes the event registration, this profile will be used to complete the payment.
Thanks for your reply. Looks simple enough.
Only problem: I bought RO Payments but can't remember having created an account. If I use the option 'Forgot username' and fill in the e-mailaccount I used when ordering I get a message 'user blocked'.
Hope you can help me out once more.