Unzip the file -- best choice is into your CustomTextures directory -- then open it up and select the folder of the desired texture. Use the dropdown box at the top of the screen to select a tile. If the tile exists, it will appear in the big box below the dropdown box.
I plan on making a tile size checker next (so you won't have 65x64 etc. JPGs in your texture directory). That could be even more useful than a seam checker for some members here. Wish me luck!
![Wink :wink:](./images/smilies/icon_wink.gif)
![Wink ;)](./images/smilies/icon_wink.gif)
EDIT: Fixed unfinished sentence in post. I have no idea what made me forget to finish the sentence...
![Surprised :o](./images/smilies/icon_surprised.gif)