@Gleedo - I spent a couple hours on this today. Apparently, I have the code needed to display birthdays already in the .php file. All I did was change one of the column's (in the showroster_userbits template) to birthday and that did the trick.
For example, find:
Code:
<vb:if condition="$show[field8th] AND exec_switch_bg()"><td>{vb:var userinfo.{vb:var columns[column8]}}</td></vb:if>
Change to:
Code:
<vb:if condition="$show[field8th] AND exec_switch_bg()"><td>{vb:var userinfo.birthday}</td></vb:if>
Now, the same thing should be true for just changing the word birthday to age to show the user's age, but it doesn't work. Something must be missing, but I don't see what it could be. I think it "should" work. If the birthday works, the age should work. It uses the birthday code when figuring out the age. I've double checked the memberlist.php for any missing code, but I don't see it. Sorry, maybe someone else will know what to look for.