flashing Dectalk express?

[Igor Gueths]

Hi all. Does anyone know if its possible to find the older Dectalk 
express firmware? This Dectalk I have appears to have the newer firmware 
installed. The only problem I see with it is that there are sudden 
differences in pronunciation, which I have been getting used to but 
sometimes can get annoying. For example, mail is pronounced as mayo. 
There are some others that I can't think of right now...Bottom line is, 
assuming I can actually find the firmware, is it possible to reflash the 
express back to the older firmware? I am assuming I would need an EEPROM 
programmer and a soddering iron to do the job? Anyone have any ideas? 
Thanks!