Data memory "Block" transfer

Hi... I'm new here and also new in plc world.... And I'm also not very good in english...
I just want to ask about how to tranfer several data in DM to another DM....
I'm using OMRON CJ1M-CPU23 and cx-one programmer. For Example I've created area between D0 to D99 where I put in each memory between that area my data(calculation,average etc).My problem is every time a flag is on (each time its on means new product is detect), I want to xfer all the before data between d0-d99 to d100-d199,so the new data for new product will be save in d0-d99, continue shifting if flag is turn on again. I think with xfer command it can be done but I dont know how to use it the right way.Also until it reach d900-d999, after that the data will be reset.
Any suggestion is appreciate....thanks

LD "New Product Condition" ; Condition when new product is made
@XFER #3E8 D0 D100 ; Transfer #1000 Data Memories from D0 to D100

> D1000 #0 ; Check for Non-Zero Data in D1000

BSET #0 D100 D1000 ; Clear from D100 to D1000


Thanks again Jay.... (It's you again...hehehe )
The program works great but maybe you misunderstand my english a little, I just want to clear the last data from d900 to d999 which means no shifting data after d900 ( 10 set of data only),
so I change to BSET #0 d1000 d1099, I thinks its ok(is it?).
So all the data only between D0-D1000....
Thanks again