HTC Apache including UTStarcom PPC-6700, Audiovox PPC6700, Audiovox XV6700 and all Its variant can now be upgraded to Windows Mobile 6 Professional. While no official software update is being released, hardcore pocket pc user has built the widows mobile ROM themselves, extending the Apache lifetime with the new OS and softwares.

Here is a list of the thing included in the ROM provided, many users have updated their phone successfully with some minor issues.

MS Office2007
MS OneNote Mobile v12.0.4518.1014
MS Winlive v10.6.31.2001
MS LiveSearch v2.0.2739.29907
HTC Home Plugin 6tab v1.5.620.722
HTC CommManager with 10 Buttons
HTC Touch Dialer With working Smartdial and ## Codes
HTC Smartdial v2.5
HTC Task Manager v1.51.30229.1
HTC Voice Recorder v1.10.611711.0
HTC Streaming Media v2.20.615718.00
HTC Audio.Manager v1.2.614712.q
Adobe Reader 2.00.288531
Adobe Flash Player 7
Arcsoft MMS client v3.0.6.24 (sorry Prehistoric version seems to be more usable for now)
Additional Ringtones, Themes, and Games
Esmertec Jeodek Java v20070425
WM5 Storage 1.75 By Thunder
DictEditor
TCPMP
SMSBackup
PimBackup
Yahoo Go! 2.0

Get the software update here

http://forum.ppcgeeks.com/showthread.php?t=7671