How to remap a topic in rviz that is issued by plugin

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How do I remap a topic in rqt that is issued by rviz plugin. I am trying to remap topic initialpose to myinitialpose. But when I use the set pose from the rviz menu it still publishes on the old topic.

[roslaunch][INFO] 2013-10-22 10:12:12,008: process[rqt_gui-6]: args[[u'/opt/ros/hydro/lib/rqt_gui/rqt_gui', u'initialpose:=myinitialpose', u'__name:=rqt_gui']]
[roslaunch][INFO] 2013-10-22 10:12:12,009: process[rqt_gui-6]: start w/ args [[u'/opt/ros/hydro/lib/rqt_gui/rqt_gui', u'initialpose:=myinitialpose', u'__name:=rqt_gui', u'__log:=/home/viki/.ros/log/9c1746f4-3b23-11e3-b242-28cfe95d78b1/rqt_gui-6.log']]