GFS Grads

Hi,

I am using Grads to produce GFS Charts and would like to know if its possible to have a script that could produce the charts for 252 hrs to 384 hrs.

The problem appears to be that the GFS 0.25 only goes up to 240 hrs before the old 0.5 model is used to produce charts out to 384 hrs.

Is it possible to have a second script that started downloading at 252 hrs instead of 00 hrs.

Anyone have any suggestions on how I could do this?

Many Thanks,

Ross