[Q] Modify USMHome.apk (ultrastamina)

I'm searching to decompile, modify and recompile USMHome.apk of the last kk .77
Why? Because I would like add Walkman app, or other music app. My files are .odex...
So I'm studying this tutorial without success!

http://forum.xda-developers.com/show....php?t=3007920

I can decompile, modify and recompile my file, but the new apk is without .odex and isn't useful!
Anyone can help me?
Thanks!