I ended up using this code;
Code:
<if condition="$bbuserinfo['field17']=='Yes'">
But i've ran into a problem
By default, Yes is the option for my User Profile Field yet as soon as I applied the code, everyone complained that the chatbar had gone.
After playing around, I worked out the only way to get it to show again was to set my option to "No, don't show" in the usercp, save changes then click "Yes, Show" and save changes and it'd show again.
What's up with that? Wierd. Anyway I can get around this?
+ the bar no longer shows for guests

is that just the downside of having a userprofile field setting?
I've also attached a screenshot of the userprofile field if needed-
http://img707.imageshack.us/img707/5205/profilej.jpg
Thank you