Mass change of profit/cost center groups

we have a requirement to mass change the descriptions for profit/cost center groups. We tried out folowing options but they are not working.

1. BDC recording for KCH2/KSH2.KCH5N - i think these are not supported in BDC.

2. LSMW using available BAPI... it can be used only if the group is not assigned in the hierarchy.

Please let me know if there is any other way of handling this.