You can switch to one of the BS2p-series of Stamps, which have additional EEPROM "slots" to write to and read from. (See READ, WRITE, and STORE in the PBASIC manual.) While the BS2 would work with a larger EEPROM, there would be no point in using one, since the pins that connect to it are inaccessible from PBASIC and there are no BS2-compatible commands for accessing the extra memory.
However, you can attach a separate serial EEPROM chip (e.g. 25LC256) to the BS2 and use the SHIFTIN and SHIFTOUT commands to access it.
Comments
However, you can attach a separate serial EEPROM chip (e.g. 25LC256) to the BS2 and use the SHIFTIN and SHIFTOUT commands to access it.
-Phil