parameters.xml for web.config changes using Web Deploy

Hi,

I need to make some web.config changes on my site using Web Deploy but can't find any doecumentation on anything.  Does anyone have any docs I can read through or a pointer on how I might change the following

 <appSettings>

<add key="poolSize" value="50" />    
<add key="LoggingStatus" value="OFF" />

</appsettings>

to

<appSettings>

<add key="poolSize" value="100" />   
<add key="LoggingStatus" value="ON" />

</appsettings>

Using Web Deploy