how do i delete the preloaded google maps. Its a jar file.

I solved it. Its in tpa/preset/system/java/gmm. Delete it, and edit your menu file.

If you want to change it to MGMaps, here is a clever solution that I found.
First download the .lng editor.
Retrieve the lng file from your phone.
Then replace all Google Maps with Mobile GMaps.
Reupload the lng file back into your phone.

Following that, install MGMaps.
Then edit your MENU.ml file.
Search for google.
Now change the values like this.

<element id="Positioning_Maps_Id">
<label type="helptext" textid="POSUI_HOMESCREEN_MAPS_HLP" />
<label type="name" textid="POSUI_HOMESCREEN_MAPS_TXT" />
<icon pos="left" source="internal">POSUI_HOMESCREEN_MAPS_ICN</icon>
<link type="java" javasuitename="Mobile GMaps" javasuitevendor="Cristian Streng" javasuitepoint="com.mgmaps.ui.MGMaps"/>
</element>

Save it, and reupload your MENU.ml, and enjoy your custom made Google Maps! !