I know you're new to the board in posting but not sure if you're new to KiXtart or not.

If you know how to use UDFs then you might be able to use this UDF.

PathMod() Modify System Variable
http://www.kixtart.org/ubbthreads/showflat.php?Cat=&Number=107085

I think there is another one as well to do this.