Any installation procedure please ?
To be quick, Installation procedure is the same that for all the modules, publish the module in the modules/registrars directory of your WHMCS installation, then you'll have to configure it. The configuration procedure is delivered with the module.
For quicker reply to your pre-sale question please use the support link rather than the review system, we usually answer to pre-sale question on our support ticketing system in the day.
Bancontact is in Belgium aswell does your module accept belgium bank aswell ?
Please confirm me this.
Would be better if you montion the accepted banks.