CHARLESS  The .pkg format is a read-only format. The entire archive is gzipped (or sometimes bzipped) together, so that the only way to modify it would be to unpack the entire archive, make your changes, then repack the whole thing back up. Also, the .bom format used to list the files in the package is a closed format, meaning that it cannot be edited without reverse engineering, which is liable to break if Apple decides to change the format and thus not a very good idea. So really, the best way to edit a package is to unpack its entire contents, make your changes to the files on the disk, and then use PackageMaker to make a new package.  
(Version 2.6)

CHARLESS  The new version I just uploaded today, version 2.5.2, should fix the crashing problem. If you experience any more problems in the future, please send me an e-mail as it makes things like this much easier to diagnose. Thanks!  
(Version 2.5.1)

CHARLESS  Could you people who are getting crashes *please* e-mail me with a crash log? I am not getting these crashes when doing any of the things you describe on my machine, and I will not be able to fix anything without more information. Thanks!  
(Version 2.5.1)

CHARLESS  I haven't seen the problem you are describing - could you please send me an e-mail with the crash log as well as a complete description of what you are doing to trigger the crash?  
(Version 2.5.1)

CHARLESS  It should work with all types of DMGs, although uncompressed ones would probably be very slow to load over the Internet.  
(Version 2.5)

CHARLESS  Thanks! I'm glad you enjoy it. :-)  
(Version 2.5)

CHARLESS  Unfortunately, you have hosed your copy of OS X, and will need to boot from the original install discs and do an Archive and Install in order to get Rosetta support back. If you are unhappy with this, you should contact the author of this app and tell him to fix this problem.  
(Version 1.3.4)

CHARLESS  That's DragThing, by TLA Systems. It's an excellent app, which you can find here:

http://www.macupdate.com/info.php/id/633  
(Version 2.0.1)

CHARLESS  This is a great program for deleting needed files and hosing your OS X installation. It's not strictly needed, though, since you could accomplish much the same effect by dragging your /System directory to the Trash and entering the admin password.

In all seriousness, beware of this utility. By default, it removes all architectures other than your machine's native architecture. This means that on an Intel Mac, it will delete all PowerPC code from universal binaries. Now, you might think this would only apply to applications on your system. You'd be wrong. This program will strip the PowerPC code from *all* universal binaries on your system, including all the system libraries and frameworks. The problem with this is that for PowerPC-only apps to run in Rosetta, they *need* the PowerPC code in those libraries and frameworks.

The upshot of this is that THIS APPLICATION WILL PREVENT ROSETTA FROM WORKING AT ALL until you do an Archive and Install.

For this reason, I would recommend against using this highly dangerous app. Messing with the system is a very risky thing to do. Sometimes those "unneeded" files aren't as unneeded as they appeared at first glance...  
(Version 1.3.2)

CHARLESS  And that would extract the entire pax file, not an individual file from it, now, wouldn't it?  
(Version 1.6.3)