Greg Ferguson
Legend!
The factory presets are assigned to Banks A-C and the "all-banks" file will automatically be placed into those slots overwriting anything already existing there. Existing presets will be overwritten after it asks if you're sure.Right - I phrased that poorly.
What if a new preset was introduced, to showcase a new amp, or for any other reason, and from the factory was positioned where you have a preset that you've built (or otherwise put in that slot)?
Instead of using the all-banks file, you can load factory presets by the individual banks, and will be given the choice of the destination bank in the modeler. Existing presets will still be overwritten after it asks if you're sure.
You can also open the Preset Manager and drop a bank file into the left-hand pane and the manager will scan and present the contained presets in the file, and you can select individual ones, or groups of them, and drag them to wherever you want in the right-hand pane. Again, existing presets will still be overwritten after it asks if you're sure.
You can leave the factory presets in banks A-C, or move them, or delete them, it's up to you. I leave them because I prowl through them looking for ideas or to grab something, and my personal presets start at bank D, slot 400, which is out of the range of the factory presets. YMMV, but then you assume more responsibility for the organization and increase your likelihood of overwriting presets you might want to keep.
In all cases, it's a really good idea to run a backup prior to beginning any changes to the presets, whether you're editing or organizing, because we all have "oh shit!, no wait!, dammit!" adventures and a selective restore of presets caught in the wreckage can make life less tense.