From what I read it appears that Gobal-finder is just about the worst hijack to get rid of. Adaware and Spybot apparently have no effect on it.
It is possible to get rid of it, as you have done, by going into the Registry and deleting various keys and also some files. However, this
can be somewhat of a slippery slope and lead to all sorts of troubles.
As an alternative to this, there is a tool called
CWShredder that can be used. This is written by the creator of
HijackThis, another anti-hijack tool. Reports say that CWShredder gets rid of Global-finder easily. There are a number of computer dedicated forums on the Internet discussing it's use.
This hijack takes advantage of ActiveX to install itself on your computer. Only Internet Explorer uses ActiveX. I guess that means I'm pretty safe from the hijack because I use Mozilla Firebird (sorry to take yet another opportunity to plug this excellent browser

).
Anyway, for Internet Explorer users, there is another tool that will help prevent further invasions of the Registry by hijackers. Check out
RegistryProt
The Registry governs just about everything that happens on the computer. The files that make up The Registry are
User.dat and
System.dat.
Regedit, which resides in the Windows directory, is used to edit these files. Do anything to your computer and it will be tracked by the Registry. Install a program or make changes to preferences and it will be recorded in the Registry. The Registry is somewhat the heart of the computer. It tells programs to start (including hijack ones) and if it faulters for any reason the effects will surely be seen on the screen.
*EDIT* Correction of product name.