Add few features to existing software in .NET. Its about small tool to copy files from source folders/subfolders. URGENT

Ned to add few features to existing working well software in .NET. Its about small tool to copy/move files from source folders/subfolders with IGNORING ALL WINDOWS ALERT AND ERRORS, and PASTE IT BY FILTERING TO DEST FOLDER. In process of paste this tool is compare the copying file with ALL EXISTING in DEST folder and if exist the file with the SAME NAME, SAME SIZE, SAME DATE DAKEN, DATE CREATED, DATE MODIFIED - THIS TOOL RENAME COPYING FILE WITH ADDING '_ren' and number in copying file, and each time increase this number. ALL is working well,SO NEED JUST TO: 1- ADD FEATURE THAT USER CAN SELECT BY WHAT EXACTLY THIS TOOL WILL COMPARE EACH COPYING FILE- BY NAME, BY SIZE, BY DATE CREATED, DATE TAKEN, DATE MODIFIED - BY ADDING 5 CHECKBOXES IN EXISTING SETTING PAGE; 2- NEED TO ADD ONE MORE FEATURE IN COPY/MOVE PROCESS; 3- Make small graphics changes.