Correct PHP code for hidden frame-based redirection (sent from htaccess)

Expanding on my original question, although the .htaccess redirect works, I'd like to redirect to a PHP document within the same domain and have it mask the redirection.

So, what I'd like to do is take:

RewriteRule ^t/([0-9]+)  http://otherdomain/tickets/$1  [R=301,NC]
RewriteRule ^e/([0-9]+)  http://otherdomain/entries/$1  [R=301,NC]

change them to

RewriteRule ^t/([0-9]+)  http://mydomain/rd.php?type=t&num=$1  [R=301,NC]
RewriteRule ^e/([0-9]+)  http://mydomain/rd.php?type=e&num=$1   [R=301,NC]

What I need is a working "rd.php" to handle a redirected request of this nature and then generate a frame-based redirect page sending the user to http://otherdomain/{type}/{num}

I have a version partially hacked together, but it's probably better than I refrain from posting and let someone whip one up in 30 seconds...

Thanks in advance!
Josh