Thanks.
Did as you suggested. What should I see after pressing enter? It just placed the term ".reg=regfile" on the line immediately underneath, and then repaeted the line that appeared when I first opened the Command box i.e C:\Documents and Settings\(my user name)> as if waiting for another instruction.

Tried to merge the file again after, but got the same error box.
Really starting to bug me now. Thanks for your input though.