unfortunately the file from bookdisk won't work on my 64 bit system.  Is there anyplace to download the files in a zip archive or some other non-executable format?

Go to www.bootdisk.com and create a MS-DOS boot floppy. It essentially gives you a DOS prompt and you would copy the file over to Windows\System32 per

http://www.winhelponline.com/blog/restore-the-missing-userinitexe-file/