SAP HCM - addon - LSOFE,OP,CP,AE

Hi friends ,

We are about to install addon LSOFE ,LSOCP ,LSOAE,LSOOP .

Can any one help to know what is pre-requisite and where to upgrade this.

this specific component ( like which one in backend system and in portal ).

and LSOFE & LSOOP is in .EXE format .

Please suggest