The present invention provides systems and methods for creating a customized POST program for use in a computing system. Specifically, the system of the present invention includes each of the routines for POST stored in different locations with associated calls for locating and running the routines. Each routine includes an instruction section containing editable data that indicates the sequence that the routine should be run in POST in relation to the other routines. The system further includes a POST program builder that builds a POST program that includes calls to each routine. The calls for each routine are stored in sequence in the POST program based on the information from the instruction segment associated with each routine. As such, the sequence with which each routine is run by POST can be changed by changing the information stored in the instruction segment associated with each routine and new routines can be added by supplying the code for the routine and providing instructions as to when the routine should be run by POST.