There are other ways you can find that number. If you notice at the post number in threads, you'll notice that it's actually a link to the post. Copy the link location.Yes, this is true, but notice that it doesn't include the post number (yours is 236021) which is something you would have to enter in as well if you would want the reader to be able to jump to the quoted post. Which would then make things more difficult. This mod (from what I can tell) is supposed to let you select text out of the post you want to quote and then be able to click a 'Quote' button which would automatically do all this work for you.
Here's the link to your most recent post: http://zeldadungeon.net/forum/showthread.php?10047-Official-Zelda-Dungeon-Suggestions-Thread&p=236029&viewfull=1#post236029
Quoting you, your post number is in fact, 236029. Just type in a semi-colon after the name of the person to be quoted and then paste the number.
Or better yet, use tags to link to the person quoted. [noparse][url="http://zeldadungeon.net/forum/showthread.php?10047-Official-Zelda-Dungeon-Suggestions-Thread&p=236029&viewfull=1#post236029"]Your last post.[/noparse]
Your last post.