How can I get Posted by (Vinny) and the X comments | Trackback (0) on the same line?
1 Edit the _main.php file for your skin, or the CSS file that it references.

How to change the width of the left and right columns for tweaking.
2 [url=http://isaacschlueter.com/category/css]Learn CSS[/url]

I'd like to cause all text in the right sidebar to be centered.
3 See #2.

The < June 2004 > above the calendar isn't justified properly (when sidebar is all formatted to center that'll take care of that)
4 See #3.

How to shorten the length of all lines (grey or just single with lines) in the right sidebar, don't want them to merely extend entire width or sidebar.
5 See #2.

How to get the comments to display in a popup window.
6 [url=http://b2evolution.net/man/2004/07/06/pop_up_howto]Read the manual[/url]

The line box that surrounds the date of each entry - any way to shorten that to a specific size instead of it going the entire length almost of each blog entry.
7 See #2.

The text at the header of the page under the banner is supposed to also link to an about me page and a messageboard, where do I insert the code to make those links happen?
Edit the _main.php file.

http://b2evolution.net/man/2004/06/04/template_functions might also be helpful. http://b2evolution.net/man is a good place to start. All of your questions are either general CSS questions (which are answered in more detail elsewhere on the Internet) or are covered in [url=http://b2evolution.net/man]the manual[/url].

Thank you very much for pointing me in the right direction and the links! Much appreciated!

>How to change the width of the left and right columns for tweaking.
>I'd like to cause all text in the right sidebar to be centered.

If anyone could let me know the actual answer to the 2 above I can get the blog up and work on the problems I haven't managed to fix later.

Look in the skins folder. You'll see a folder for each skin you have.
Open up the one that you're using.

Look for a CSS file (something.css). Compare that with the actual XHTML (right-click, "view source") of your page. Change what needs changing.

This isn't really the place for a full-scale "How to use CSS" tutorial. Follow the [url=http://isaacschlueter.com/blog_roll?cat=48]link I provided[/url] to find some of those.