stream profile-- using irule need to replace text

Hi,

I regularly use similar irule that do not rely on stream profiles :

when HTTP_REQUEST {
    HTTP::header remove "Accept-Encoding"
}

when HTTP_RESPONSE {
    if { [HTTP::header Content-Type] contains "text/xml" } {
        if { [HTTP::header exists "Content-Length"] } {
            set content_length [HTTP::header "Content-Length"]
        } else {
            set content_length 1000000
        }
        if { $content_length > 0 } {
            HTTP::collect $content_length
        }
    }
}
when HTTP_RESPONSE_DATA { 
    HTTP::payload replace 0 $content_length [string map "InstallApplication" "MisMatch000" [HTTP::payload]]
    HTTP::release
}