1. Do I need to uninstall open-vm-tools from my Linux systems that include it automatically (OpenSuSE and Debian)?
2. So far I just have left well enough alone - do Parallels Tools coexist with the open-vm-tools and open-vm-tools-desktop?
A simple way for Parallels to improve their *nix support is to provide the ability to configure a vm to use open-vm-tools (open software).
This would reduce the problems in *nix systems due to poor or non-support of various *nix drivers such as video, network, and SSD/HD.