Would like to add some drop down info under the avatar

[محروم.كوم]

There is another forum that i'm on and they have something where people can fill out fields for info on their jeep and it will make a drop down menu. here is an example on a random thread.
http://www.jeepforum.com/forum/f9/old-man-emu-855595/
Basically i'd like to do the same thing that you see right below the username that has the vehicle modifications when you click on the arrow. I run my forums for tuning cars so i would like to do the same thing, but with different fields. If anyone can point me in the right direction i would really appreciate it!! __DEFINE_LIKE_SHARE__