help needed with RewriteRule

hey guys,
the rule below currently rewrites a URL such as:
"mydomain.com/profile/pictures.php?profile=BLAH&imageid=999&page=11"
to:
"mydomain.com/BLAH/pictures/999/11/"

RewriteRule ^([^/]+)/pictures/([^/]+)/([^/]+)/?$ profile/pictures.php?profile=$1&imageid=$2&page=$3 [NC,QSA,L]

..but i need this rule to also work even if the "imageid" and "page" variables are not set; so i can use URLs such as:
"mydomain.com/BLAH/pictures/999/"
and:
"mydomain.com/BLAH/pictures/"

can anyone please suggest how my RewriteRule needs to be changed for it to work with the above URLs?- or would it be a matter of writing an additional two rules for URLs without those variables set?

hope ive explained myself well, thanks for any help

As far as my understanding goes, you will need to have two additional rewrite rules for those. I'd suggest putting them under the other two and making each line a 'last' match as otherwise you might run into problems.

You can make a line last by adding the [L] flag at the end of it.

thanks Eldarrion, i'll do that then (: