You bet, Fun post and writeup, took me a bit down memory lane. I built several sites with nested table-based layouts, 1x1 transparent gif files set to strange widths to get layouts to force certain sizes. Little tricks with repeating gradient backgrounds for fancy 'beveled' effects. Under construction GIFs, page counters, GUESTBOOKS!, Photoshop drop-shadows on everything. All the things, fond-times. One or two I haven't touched in 20 years, but keep online for my own time-capsule memory :)
Well this was interesting. As someone who was actually building similar website in the late 90's I threw this into the Opus 4.5. Note the original author is wrong about the original site however:
"The Space Jam website is simple: a single HTML page, absolute positioning for every element, and a tiling starfield GIF background.".
This is not true, the site is built using tables, not positioning at all, CSS wasn't a thing back then...
Here was its one-shot attempt at building the same type of layout (table based) with a screenshot and assets as input: https://i.imgur.com/fhdOLwP.png