Hi there, i've a cluster setup of two nodes with ispconfig. I've just bought the Billing module. Now i've to install the module on both nodes of cluster or only on the master server? And another question, i read that i can install a second copy of the billing module on a test server, there are some kind of check during installation or similar that can hang up the production server (eg.: check on number of installation or similar)? May i translate the module in my language through the panel? Thnx for resposne.