A mobile station includes client circuitry for facilitating wireless communications with a wireless communications system, and a configurable system selection unit that executes a system selection and acquisition procedure. The configurable system selection unit includes a front end and a system selection core. The front end facilitates communications between the configurable system selection unit and the client circuitry. The system selection core is coupled to the front end and includes a script engine and a nonvolatile memory storing at least one script table. The script table includes a plurality of system selection event conditions and corresponding scripts that define a system selection and acquisition procedure. The script engine is adapted to detect an event condition and execute the corresponding script. The system selection core is adapted to receive a system selection script and store the received script in the script table, thereby altering the system selection and acquisition procedure.