[kbl]

This is not a complete list... but I dumped the rom and here's what is in the SYS folder for Piperom v1.2 (full):

Additional Ringtones
Additional Themes
Additonal Sounds
Adobe Flash Lite
Adobe Flash Player 7
Adobe Reader
Advanced Configuration
AllMobileMines
AUTOUPDATE
Autoupdate_Lang_0409
BaseApps
BaseAppsFiles
Base_DPI_96
base_dpi_96_resh_240_resv_320
Base_Lang_0409
Base_Lang_0409_DPI_96
Base_Lang_0409_DPI_96_RESH_240_RESV_320
Bluetooth
Bluetooth_Lang_0409
BROWSING
BROWSINGCORE
Browsing_DPI_96
Browsing_Lang_0409
BTDUN
Bth_A2DP
Bth_A2DP_Lang_0409
Bth_HID
Bth_HID_Lang_0409
Cambridge BT Profiles
Carriers_Telus
Catalog
Catalog_Lang_0409
Chess
CommonNonEA
Contact Fixer 1
Dopewars
dotFred Task Manager
DRM
Enterprise
Enterprise_DPI_96
Enterprise_Lang_0409
Enterprise_Lang_0409_DPI_96
Entertainment
Entertainment_DPI_96
Entertainment_Lang_0409
Entertainment_Lang_0409_DPI_96
FileDialogChanger
Fix Unread Count
FlashVideoBundle
Frogger
FTouchFlo
FWUPDATE
Fwupdate_Lang_0409
GPS-Today
GPSID
Guava Bubbles Theme
HButton
HHCv10b6
Hidden-GSGetFile
Hidden-Office-Requirements
HTC Album
HTC BT Quicklink
HTC Home 2
HTC Home Color Icons
HTC Smartdialing
HTC Streaming Media
HTC TaskManager 2
HTC Touch Keyboard - HP
HTC Zip
HTCustom
HTC_EnlargeStartMenu
HTC_Vogue_Camera
InboxMenuExtensibility
INTERNETSHARING
IPSECVPN
IPSECVPN_DPI_96
IPSECVPN_Lang_0409
IRDA
IRDA_Lang_0409
JAVA_Esmertec_Jbed_Java
Kevtris
MediaOS
MediaOSFiles
MediaOS_dpi_96_resh_240_resv_320
MediaOS_Lang_0409
Metadata
Microsoft Live Search
Ms
MusicID
NetCF3
no2chem_advanced
no2chem_netCF35_Messages
no2chem_nuetools_base
no2chem_nuetools_nueAudio
no2chem_nueTools_nueExtROM
no2chem_nuetools_nueFonts
no2chem_nueTools_nueThreadedSMSControl
no2chem_nuetools_setCalibriFont
OEM_HTC_Biotouch
OEM_HTC_TouchFlo
Office-Excel
Office-Powerpoint
Office-Word
OS
OSFiles
Phone
Phone Codes
PhoneBoost
PhoneRedist
PhoneRedist_DPI_96
PhoneRedist_Lang_0409
PhoneRedist_Lang_0409_DPI_96
Phone_DPI_96
Phone_dpi_96_resh_240_resv_320
Phone_Lang_0409
Phone_Lang_0409_DPI_96
Pocket RAR
ppgprov
QuickMenu
Redist
Redist_DPI_96
Redist_dpi_96_resh_240_resv_320
Redist_Lang_0409
Redist_Lang_0409_DPI_96
RemoteDesktopMobile
RemoteDesktopMobile_Lang_0409
RUNTIMES
Screen Capture
Shell
SIM_TKit
Skin-KB-BL OSXBlue
Skin-Phone-no2chem_dualtouch
Smartskey
SMIME
SMS_Providers
SoftKeyApplet
SQLCE
SqlCeMobile35
SQM
Startup Animation
TCPMP
Total Commander
Tweak-Cleartype On
VistaHide Battery Gauge
WindowsLive
WindowsLive_DPI_96
WindowsLive_Lang_0409
WWAN
XIP_WinCENLS_WWE

That should help somewhat...