Enable ~/.hedgewars/Data (or platform equivalent) to override/extend pretty much everything in system Data dir. Obviously desyncing can occur, so this is at user's own risk. Should simplify map etc install. Needs testing.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>get-task-allow</key>
<false/>
</dict>
</plist>