I wasn't aware of anything, until I Googled and found this:
http://www.macworld.com/article/1051531/diablotin.html It's old, but it might help.
I would be extremely dubious about using a piece of software which hasn't been updated since OSX 10.2.8, 2006 (see
Diablotin's home page).
There is virtually no discussion of this software anywhere on the web. This alone indicates that the software is a rogue concept.
Generally speaking, there aren't "extensions" in OS X like there were in OS 9 and earlier.
There is also not a lot of discussion of removing so-called extensions (as Paddy notes the concept is not really germain to OSX) for troubleshooting purposes outside of the afore-mentioned "Safe Boot".
IMHO picking apart the OS like this will 'end in tears' as the expression goes, and I hope you have a really good back up for when things go all 'pear shaped'.
You haven't told us which of your machines (from sidebar) is causing issues.
However it was helpful that you specified OSX 10.4.11. That leads me to the question that dealing with OSX since its inception suggests to me is the most relevant here, namely,
how old is this install of 10.4.11?
I am thinking you would be far better off doing a
CLEAN INSTALL of your OS over a nice fresh
NUKE 'N' PAVE reformat.
Certainly better than dicking around with a bunch of extensions that could render the machine inoperable......
YMMV