Theres a zip file attached here that I think has all the EPST shortcuts - just unzip and drop it into the Programs folder, then run like any other program.
http://forum.ppcgeeks.com/showthread.php?t=14440
EPST codes used to break in some roms due to dialer conflicts, like kaeslumz said. All is fixed in the WM6 kitchen.
[Edit: Attached shortcut folder]