Note that many websites have their own advertising, unrelated to adware.
NetPal is an IE Browser Helper Object from Mindset Interactive, the people behind Transponder. It does similar things to the Transponder range, but is quite different internally.
The software installs netpal.dll into your Windows System directory. Before you can delete this file you will need to deregister it. Enter the following commands from the command line for Windows 95/98/Me:
regsvr32.exe /u netpal.dll
Or for Windows NT/2000/XP just:
regsvr32 /u "%WinDir%\System32\netpal.dll"
After doing this and restarting the computer you can delete the file. You can also delete 'kernellos.dll' in the same directory, which is a data file used by NetPal (and isn't a DLL at all), and the registry key HKEY_LOCAL_MACHINE\Software\Destiny