This is actually just a test post for the new forum system, but I thought that I'd take the opportunity to mention that this is the 10 year anniversary for L&M. A lot has changed over the years. We've moved from Seattle, to Florida, and back to Seattle. I've started a YouTube channel, and the community has grown and waned.
So, here's to a new beginning! And another 10 years.
Unfortunately, I can't personally give you any advice about activating your copy of CS2. I used CS2 back in 2009 or so, and for most people it will have all of the features that we could possibly need (and more), so I understand your reluctance to install a newer version. As you are probably aware, Photoshop can no longer be purchased... you'll have to pay for it on a monthly basis (it's about $10, bundled with Lightroom).
I have mostly switched over to using Affinity Photo instead. It's an immensely powerful photo editor like Photoshop, with lots of great tutorial videos and a strong support community, and it costs something like $40 (total, just once) instead of $120/year.