Solved RAID 5 switched from single storage to raid 5, lost drive letter

I am running 7 pro 64bit on a ASUS p8p67 deluxe mobo and I copied all data from my 1tb storage D: drive to a backup external and proceded to install raid 5 with 3 single 1tb drives and the raid is up an running. However using Intel Rapid Storage Technology to setup the raid inside windows I had to use the drive letter R: because D: was not available in the list option. When I start some programs, the program is looking for the data on D: drive. Is there any way to change the letter of my raid storage from R: to D:?

Thanks
Jeff

It's possible the cd-rom/dvd drive assigned itself as d: before the new raid was created.
This should be solvable using the windows disk management tool if that's the case.

Thanks Maguscreed

That was exactly what happened and I forgot to even look lower on the Disk Management window.. I was able to right click and change drive letters in the Disk Mg window.

Thanks again
Jeff