Yes, however, if you are running the latest version of X-Plane 10 then you can actually alias/shortcut your Custom Scenery folder to only ONE of the installs to save on space. This was something I worked with Ben Supnik to add a couple of months back at a conference in Columbia, SC. Lastly, however, to my knowledge the Airbus from Peter does NOT utilize SASL, and as such no issues should be present even if Gizmo is installed (just as is stated here that errors still exist even with Gizmo removed).