Okay cool, thanks for the clarification. I didn't want to come off as haughty, snooty, condescending, etc., as I didn't know the particulars. I just want to try to help, and as you know, tone is very hard to convey online. Thanks for not misunderstanding my previous post.
I'm trying to visualize your setup... so your wireless router is physcially connected to your DSL modem/router, as are your workstations. The wireless router is configured to allow Internet connectivity ONLY, hence the reason for the setup. Is that correct? If so, I'm wondering if the wireless network feature of your DSL modem/router got accidentally turned on? That could explain why Nessie is butting heads with your workstation...