The network adaptor setup disc is region locked and will not boot on a console with an active modchip.
Originally Posted by about 99 nuns
You do not need to run the network adaptor setup disc to configure the network adaptor for use with homebrew software, and the network adaptor setup disc is only used to create a network configuration that will only be used by Sony software.
As DemonicStrife had mentioned, OPL and uLaunchELF will allow you to configure the network adaptor for usage.
EDIT: Since you got yourself an Network Adaptor, why not get a HDD and play games off it instead? A 2.5-in SATA HDD can be used if you got a SATA to IDE adaptor.
SCPH-10000 S. MINOKAMO v1.01 (Defunct)
SCPH-10000 S. KISARAZU v1.00 (faulty)
SCPH-15000 S. KOHDA (With warranty seal!) :D
DESR-5100 S. EMCS