CUDA Fortran How to insert a script CUDA on fortran

Hi, I really need help colleagues. I got a final project to analyze the simulation time Fire Dynamics Simulator (FDS) FDS in this case made ​​using fortran 90. If I want to add CUDA script in this case means I need to add CUDA Fortran script (. Cuf), how to add scripts CUDA in fortran? because I see examples of smoke that uses C language for the script CUDA was no file with the extension .cu
If there are colleagues who have a sample project that uses CUDA Fortran may I ask for his link?

thanks for the response you give

You can start from this presentation:
http://www.nvidia.com/content/PDF/isc-2011/Fatica.pdf

There is plenty of material at:
http://www.pgroup.com/resources/cudafortran.htm

Dr Fatica

how long do you think it would take to start from scratch on HPL-2.00 and graft the GPU enabled code to replicate the ideas on your paper? The target would be a cluster of modern multicore SMPs enabled by 1 or 2 Tesla GPUs per node. The objective is to have the CPU BLAS cooperate with the GPU CUBLAS to work together on the matrix computations and not say just off-load everything to the GPU.

Does Nvidia plan to provide this S/W layer to help with splitting the computation forking into CPU and GPU parts and then join to combine results, w/o allowing much of underutilization of either parts? In my oppinion manually splitting down the computation to the right granule and scheduling the communication streams back and forth to the GPUs is very cumbersome for the developer.

Any hints would be greatly appreciated.

–michael

The posted code does this already.
It also try to balance the workload between CPU and GPU.