Does it strike anyone else as odd that the ancients don't seem to be that great with wireless technologies? Sheppard has to go down nine levels to the core to plug in his tablet with this huge laughable connector on it. Hell even with todays tech I can upgrade an access point 300 miles away from my desk. Not even to mention the fact they don't seem to be big fans of 802.1x technology either...but so long as we need to exploit parallelism and spontaneous resynchronisation of packet boundaries blah de blah blah everyone seems to be deliriously happy about the unrealism of it all.
Its far more likely Rodney would have been able to find the wireless network operating in the city tried to decrypt passwords using some ancient decryption technologies hopped on the network and remotely updated the core, which in all likelihood would have had some horrendously complicated security systems to get past, but then how do we get rid of Weir?