Which of these SaskTel OEM Extrom cabs need to be installed?

[DoctorDex]

Hoping someone can help me with this one.

At the moment, my apache runs like crap. For that matter, it has always run like crap and I'm hoping that by ridding myself of all of the SaskTel OEM Extrom progs. my device will run more like how my old HTC Himalaya did. Here's where I run into trouble. Can somebody help me out and tell me which of the following cabs are essential for my phone to run properly? Or better yet, what each of the cabs files is for?

utpcd240x320.bmp
P_ButtonLock_Apac_203700.sa.CAB
P_EnableOfOperation_Apac_203700.sa.CAB
P_ICON_Apac_203700.sa.CAB
P_SMStimestamp_Apac_203700.sa.CAB
P_LocationSetting_Apac_203700.sa.CAB
P_Import_apac_203700.sa.CAB
PP_EnableTimeSync_Apac_208700.sa.CAB
PP_ErrCode_Apac_209700.sa.CAB
PP_SMSInteractive_Apac_208700.sa.CAB
PP_SMSPriority_Apac_208700.sa.CAB
PP_StartHome_Apac_208700.sa.CAB
PT_BT_Apache_205200.sa.CAB
PP_8BIT_UNICODE_Apache_208700.sa.CAB
PP_ChangeTtyModeWording_Apac_209700.sa.CAB
UTSI_Cert.sa.CAB
Signed_BWASettings3.sa.CAB
Signed_Sasktel_ExtROM211507.sa.CAB
Signed_SASKTEL_DPST2.sa.CAB

Thanks in advance.