Hello,
Just a note about the RS-232 cable from Dealextreme:
http://www.dealextreme.com/details.dx/sku.14664
This is a direct connection cable, this means that there is no level-converter between the phone and the RS-232 port from the PC. Despending on the RS-232 port of the PC, I would expect that this can/will damage the phone. I have one of those cables here and can confirm that there is no level-converter in between.
Best regards, Dieter