Hi Bob4,
In C:\WINNT\system32 you should see a file called C1sp_be.dct - that is the British English dictionary file. There is also C1sp_bec.dct which is the compact version of that file.
Under Start, Programs, ComponentOne Studio Enterprise, .NET Components (2.0), Spell for .NET, you should see the Dictionary Utility.
Click on the button next to the Dictionary File and browse to C1sp_be.dct. Choose that as your dictionary file and you should be all set.
If you are using the WebSpell IDE, you can follow this link for instructions: http://helpcentral.componentone.com/nethelp/c1webspell/searchresult.htm?turl=dictionaries2.htm
Thanks!