anyways, heres a limited, all purpose swapper. it scans for dependencies and lets you swap them, as well as allows the meta swapping of tags...
this program will be completely obsolete when gravemind comes out but till then knock yourselves out.
UPDATE:
New stuff:
-allows the loading and swapping of nulled out dependencies
-double click a dependency to access its tag
-resigner
-no need to swap sizes any more, it does that for you
-a 'restore' button that will set the meta back to normal
-allows you to swap dependencies to different tag classes
-differentiates between dependencies and lone IDs
Only works for campaign maps for the same reasons grimdoomer posted.
Edit as of 6/6/08: You may have noticed I haven't been involved in Halo modding for a bit, but I noticed people still use this program. I just started learning web stuff, so I made a site for this program, and maybe I can make a few bucks if people click ads (please don't go crazy clicking rapidly). Well, that's pretty much it, happy modding, and if you have any questions just contact me.

new download: Click here
Enjoy...