layout logic for BF3

[komunyako]

In BF3 I need 3 different layouts.
1 for foot
2 for vehicle
3 for jets/helicopter

I don't wanna ask for integration (too late >_>), but it will be nice if i have ability to trigger some <game> section with master section.
Maybe like this:

<game>
    <layout>
        <name>master</name>
		<binding>
			<name>Activate Foot cfg</name>
			<conditions>
				<key>
					<which>num_1</which>
				</key>
			</conditions>
			<actions>
				<enable_binding>
					<name>foot</name>
				</enable_binding>
				<disable_binding>
					<name>jets</name>
				</disable_binding>
			</actions>
		</binding>
		<binding>
			<name>Activate Jets cfg</name>
			<conditions>
				<key>
					<which>num_2</which>
				</key>
			</conditions>
			<actions>
				<enable_binding>
					<name>jets</name>
				</enable_binding>
				<disable_binding>
					<name>foot</name>
				</disable_binding>
			</actions>
		</binding>
    </layout>
    <layout>
        <name>foot</name>
    </layout>
    <layout>
        <name>jets</name>
    </layout>
</game>