First, do a pilot annotation on a small sample of your corpus and try to major types or errors. Remember to make ur tags easy to read and consistent and then apply to the whole corpus. The 62 categories of errors of CLEC can be a reference in ur annotation.
U can follow the directions in the post 用Word 制作机助附码工具:不会编程也能做http://www.corpus4u.com/forum_view.asp?forum_id=7&view_id=678 to do ur annotation but do not expect there is such a word "faster" in manual annotation because the speed depends on ur interpretation of the errors.