If you have any favorite website templates from the early 2000s you can likely use them here!
To be clear, I didn't make this layout or image! The original HTML/CSS comes from a site called SunnyNeo, while I believe the artwork is official Neopets artwork that was edited by whoever made the layout.
This layout relies on tables, which it seems you can't reduce the width of in cohost or prevent the background image from repeating, so if you want to get them to display properly on here, you need to wrap the entire thing in a div that's scaled to the width you want the table.
To get the styling to work, take a look at the div names in the HTML, and add a style element to the div itself, which you copypaste the CSS from the style with a matching name into. If there are any double quotes around URLs you might need to replace them with single quotes.
It's usually good practice to rehost images instead of hotlinking from the site you got the template from so you don't use up all the bandwidth of their site. You can rehost on your own site, or with cohost itself by uploading images to a post and saving that post as a draft! That's what I've done here out of courtesy to SunnyNeo.