If I am mod_rewriting a URL from:
http://www.mysite.com/blog/this-is-my-title/1/
to
http://www.mysite.com/blog.php?title=this-is-my-title&id=1
It's possible to append it, with the QSA (query string append) flag.
RewriteEngine on RewriteRule {from-url} {to-url} [L,NC,QSA]