Neriifur Assuming your Wireless card allows such settings, you can set one up using an elevated Command Prompt:
Code:
netsh wlan stop hostednetwork
netsh wlan set hostednetwork mode=allow ssid=instacheck key=01234567
netsh wlan start hostednetwork
Then connect to it on the 3DS using "instacheck" as the SSID, and "01234567" as the passcode. If everything works then it'll show up on Instacheck as normal.
On another note, any chance of the code for this going public. Would be interested in making a Mac version of this, since Wireless hotspots and packet capture, etc. come with native implementations.