I've installed jb piano(wm app) on my PC and i found .pkg file, it's name is d.pkg, next to it is jbpiano.exe setup.exe and .dat file. Maybe pkg file could be use as file for e6? I've installed this file, and i had positiv communicat: App installed. But i can find application on my phone. In unninstalation mode i can't see it...
Maybe someone could change this pkg files that it could workon e6? Here's a link FreewarePPC.com - Freeware Pocket PC / Freeware Windows Mobile: JB Piano v1.7