Can some actions be repeated when the progress bar is shown?

Hello!

Please help me to solve the following problem:

I have a script that polls the state of some resource. I need to get resource state as zero before beginning of product installation. I'm trying to use the following code snippet in the InstallBuilder's project, but it not works because I can't call wait-setInstallerVariableFromScriptOutput actions one more time:

<showProgressDialog>

    <title>Get state for some resource</title>

    <actionList>

        ...

        <setInstallerVariableFromScriptOutput>

            <exec>sh</exec>

            <execArgs>get_resource_state.sh</execArgs>

            <name>resource_state_code</name>

            <progressText>Please wait ...</progressText>

            <workingDirectory>${action_scripts_dir}</workingDirectory>

        </setInstallerVariableFromScriptOutput>

        <!-- Need to repeat this actions if resource_state_code does not equal zero -->

        <wait>

            <ms>1000</ms>

            <progressText>Resource state: ${resource_state_code}</progressText>

            <ruleList>

                <compareValues>

                    <logic>does_not_equal</logic>

                    <value1>${resource_state_code}</value1>

                    <value2>0</value2>

                </compareValues>

            </ruleList>

        </wait>

        <setInstallerVariableFromScriptOutput>

            <exec>sh</exec>

            <execArgs>get_resource_state.sh</execArgs>

            <name>resource_state_code</name>

            <progressText>Resource state: ${resource_state_code}</progressText>

            <workingDirectory>${action_scripts_dir}</workingDirectory>

            <ruleList>

                <compareValues>

                    <logic>does_not_equal</logic>

                    <value1>${resource_state_code}</value1>

                    <value2>0</value2>

                </compareValues>

            </ruleList>

    </setInstallerVariableFromScriptOutput>

...

</showProgressDialog>

Important questions: can I repeat wait-setInstallerVariableFromScriptOutput actions calling until resource_state_code variable is not equals zero? Can I continue to show progress bar while it doing? If yes, how to do it?

Thanks in advance!