some basic explanations to a new user: debian

[Largo]

I'm not sure, but i think if you have plesk installed it won't work. Plesk itself is an alternate control panel and it's already setup. You'll have to reinstall the Operating System (Debian) make sure it's a minimal install so it only installs the OS itself and nothing else. Then proceed to install ISPCP. That's really the only route that i know of. Someone might know better, but these forums have been really dead recently so you may not get a better answer.