1. Yes, either assign a higher priority (lower number) to the technical support skill group, or use a priority node after you queue the call. The default priority of a queue to skill group node is 5, I would move it up to 4.
2. Yes to skill group, not sure what you mean by agent level? You really can't make agent's have more priority than other agents in a skill group, all agents in a skill group are treated the same.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.