Those are best entered in the text field of the "Search" function.
All those shortcuts are activated by writing the shortcut-sign, followed
by a dot (hint: a real point - so tap twice) and then a number:
1 - activate debugger (be careful with that one !)
3 - disable auto power off
4 - show user name
6 - show ROM date
7 - toggle NiCd / Alkaline battery type
8 - enable inverse backlight mode
Disable hotsync timeout
Start the hotsync application
Press UP and DOWN together (Palm Tungsten: either one of both)