[punky]

Ok, a few points:

1. HR doesn't need a closing tag, so only <hr> is needed
2. They auto centre align (or should do.)

I have just written this and tested it in FireFox and IE and it works

CSS:

hr {
width:55%;
height:5px;
}

HTML:

<hr>

Second point, you can use CSS in tables. Just use the table element tags (table, tr, td), like the HR one above, like:

table {
...
}

or combining multiple:

table, td, tr {
...
}

HTH mate.