Create A Forum - Support Forums

The forum you posted looks good but doesn't seem difficult to replicate, maybe just time consuming. If you break everything down however, what makes it look good is the combination of A) background image(s), B) background colors, and C) text colors. All 3 of those can be easily learned:
background images:
background-image: url('URL');
background colors:
background-color: #????;
colors:
color: #????;
That's the bare minimum for those code, there's some more advanced stuff available but I hope you get the point. You can't expect to magically have a good looking forum unless it's already done for you, except it isn't(well maybe some of the styles in the Style Manager are kinda good).

You need to enable Flash in posts:
Admin CP > Posts and Topics > Embed flash into posts

Ok well you can embed it but if code isn't provided, it most likely means that they don't want you to embed it. However, the code is:
[flash=730,410]http://colors.in.com/player/time-being-player.swf[/flash]


You can put HTML code anywhere on your forum that allows HTML such as ezPages, HTML ezBlock, and Headers and Footers.

You can upload it as an attachment in a post.

There's stats for the top 10 boards: http://support.createaforum.com/index.php?action=stats

Google learns that your site exists if you put links to it. A google bot would go to a website and check its content then follow links that are on it. Basically, get your links on other websites to get noticed quicker. Advertise responsibly

Can you post a screenshot of them