and then??? reading from a eeprom is really much faster than this.

Once the spread sheet is created and loaded into the EEPROM, you just need to read the results from. The longer part of the job will be to produce the spread sheet and load it to the EEPROM.

But if you have some VB programming ability, that will make things easy. In VB you can create your own .BIN file with your own format. Once it's done, you have two(or more) choice:
  • use your favourite EEPROM programer to dump the file to your EEPROM
  • create a VB program to send data to your PIC, then from your PIC to your EEPROM
Personnaly, i'll prefer the second one if the hardware permit to do it.