KraZed,
Did you try this webmaster mode :
https://www.youtube.com/watch?v=9QrpH4cQGpE ?
I am sure this way you can find a template you are using.
However as you find a CSS you can specify height and width there directly.
.menu-manufacturers td a img {
-ms-filter: alpha(opacity=30);
filter: alpha(opacity=30);
height:auto;
width:140px;
}
Let me know if you need more help.