All of the synth/samplers.... DimPro included should have a file tree... normally located in the browser view. This is important since many people including myself install the sound libraries on other drives in the computer.
All you need to do is open that browser window in the sampler and navigate to the drive and folder that contains the samples. Click it and you're good. DP will be able to find them in the future.
If the files exist, as you said they do, then it's simply a matter of locating them in the browser of the synth.
I can't tell you more than that since I'm not on the DAW right now to open my synth.