It would be great and pretty easy to do except that KiX cannot create the file format required.
Microsoft NTBACKUP uses Unicode UTF-16LE NO BOM for creating and reading a .BKS file

Long post on different discussion that then brought up the idea of using NTBACKUP
http://www.kixtart.org/forums/ubbthreads.php?ubb=showflat&Number=193773#Post193773

If you're willing to install KiXforms then you might be able to do it.

UDF for it is here: (not certain it will will write the file correctly now as MS has changed it)
createBKS() - create selections file for NTBackup
http://www.kixtart.org/forums/ubbthreads.php?ubb=showflat&Number=120687#Post120687