hi

I've done debootstrap wheezy installation on my local PC using this manual.
I would like to install on a Wyse Cx0 thin client.
Is it possible to create an install iso of this debootstrap installation?

You can create a bootable iso with the mkisofs command but to be enable to install it you would need the debian-installer software on the system. I've never used debootstrap and don't use Debian. You could try finding the debian-installer and including it in your installation, I have no idea how you would do it. I've installed Debian in the past and last year used remastersys to create a bootable/installable iso of Debian. Remastersys uses its own installer as the debian-installer would not work. The developer explained the reasons but I no longer remember. I'm not sure this would work for you but you might check into getting remastersys.

Just tar the debootstrap installation and add it to a minimal ISO of a Debian live-system. Boot from that and untar the installation on the file-system that you want to install to. Then install a bootloader, done.