Hi, Bill wrote: >I was hoping someone could tell me if it is possible to >re-program the program flash memory of an 18F452 without >erasing the data EEPROM. And, if so, how to do it using >an ICD2 and MPLAB (and what version...) Yes this is possible, look under: Programmer->Properties Look in the hep file for the ICD2 there are some hints there aswell. /Tony -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu