This is unlikely to happen, as it would require hacking the actual BBS code.
That doesn't require hacking a code. User profiles have 5 extra filelds that are usually unused. I'm using the same software on my company site. There is w3tvars.pm file in modules directory (i'm using perl version but i suppose the php version has the same archidecture). That file stores User defined variables that will have to be definied anyway.
# These are the extra fields for users to fill out in their profiles.
# If you leave these blank they will not be used. If you give them a
# title then they will be. These will also show up on the user's profile
# page.
$config{'extra1'} = 'Car make';
$config{'extra2'} = 'Car model';
$config{'extra3'} = 'Car year';
$config{'extra4'} = '';
$config{'extra5'} = '';
And off you go
Veiko
veiko@lc.ee
MK1 #317 - 20GB green