It is different than this method described in
The X10 FW 2.1 hides the Gallery 3D launcher, so we use the easiest harmless way to fix this by creating an application that will launch the Gallery 3D.
Added app launcher of Music for Xperia X10 with FW 2.1
Music Widget not supported by this app.
In order to properly bring up all features of Music and its Widget, you need someone with knowledge of decompile, recompile and repackaging of APK.
What i make is not a Gallery application, nor i hack or do anything with the existing Gallery. What i post here is a standalone application that acts as a shortcut or launcher to existing Gallery application in your phone.
This app works with any Android 2.1 which have Gallery shortcut hidden by manufacturer.