initial inventory load.

I am loading inventory in to my system for the first time. I am using movement type 561.

whats happening is my WM settings are set to next empty bin concept. so when I load the inventory using this concept. the system will propose the next empty bin.but all my materials are in some particular bins already in some system.so the business has to move all the material according to sap provided bin numbers.

is there any way to upload inventory in to the bins provided by the business.