You can create your own PCM audio files in an audio editing program like Cool Edit (from http://www.syntrillium.com/ ) It can save audio to the raw PCM format. It must be be 44.1 in 16-bit stereo in order to work with the pcmplay program on the empeg. You play any PCM file on the empeg if you have the pcmplay program and you type
pcmplay < audiofile.pcm

You can replace the morning.pcm afternoon.pcm and evening.pcm with your own pcm files if you want to customize my TTS Clock to greet you in whatever way you want.

And as for the 5 hours off problem, until we figure out how to sync the timezone in the shell with the player app, you have to set your time zone in the player app as "Universal" and set your time accordinly.