1. You can use alternative configurations to have different voicing for a sample set. You need to set up the whole instrument again in the alternative configuration.
2. You can use HW backup to effectively copy the settings from one configuration to another (from the main configuration to one of the alternatives for example) see page 30 in the manual. This copies the settings for all organs from one configuration to the other. I don’t believe there is a supported way to copy just one instruments settings from one configuration to another.
3. If you restore another user’s settings to one of your alternative configurations, you will possibly end up with a corrupt installation since their configuration may reference samples, devices, etc. you have not installed / connected. The manual does not really discuss this.
Whatever you do take a full backup of your settings before trying anything so you can at least get back to where you started.
Iain