Mine

# error handling
ErrorDocument 400 /bcp/error/400
ErrorDocument 401 /bcp/error/401
ErrorDocument 403 /bcp/error/403
ErrorDocument 404 /bcp/error/404
ErrorDocument 500 /bcp/error/500

# site config
Options -Indexes
DirectoryIndex index.inc index.php

# rewrites
Options         +FollowSymLinks
RewriteEngine   On
RewriteBase     /bcp/

RewriteCond     %{REQUEST_FILENAME}     !-f
RewriteCond     %{REQUEST_FILENAME}     !-d
RewriteRule     /bcp/([a-z0-9]+)$    /bcp/index.php?s=$1 [PT,L]

RewriteCond     %{REQUEST_FILENAME}     !-f
RewriteCond     %{REQUEST_FILENAME}     !-d
RewriteRule     /bcp/([a-z0-9]+)/([a-z0-9]+)$   /bcp/index.php?s=$1&p=$2 [PT,L]

#RewriteCond     %{REQUEST_FILENAME}     !-f
#RewriteCond     %{REQUEST_FILENAME}     !-d
#RewriteRule     ^([a-zA-Z0-9\-]+)/([a-zA-Z0-9\-]+)/([a-zA-Z0-9\-]+)/?$   /index.php?s=$1&p=$2&id=$3 [L,QSA]