Indexing a fixed array

Hello,

I have two columns of data (x,y) which I wish to copy and paste into a 64 row x 2 column range. The two columns consist of 254 rows (254 x 2) and I need to process 64 rows at a time (64x2). I would like to set up a macro that will allow me to scroll through the 254 x2 coping and pasting 64x2 at a time. The 64x2 evaluation is sequential so I would like to be able to have the macro index the 64x2 copy array, i.e. a forward macro and backward macro to allow sequentially moving through the 254x2 array but 'capture' (copy and paste) 64x2 at any one time. I have had limited success by creating an index of the sequential 64x2 arrays on a second tab within the workbook however because I have to set a specific copy range, I can only index through the 64x2 arrays in the second tab in the forward direction. Is there a command that will let me define the copy array and then index the copy array?

Brad