Shakeel,
I too did a lot of multisampling on the Yamaha pro when I had it, and these were from Akai CD's (Symphony of voices etc). When converted into Wav format from CDXtract on my PC, I loaded each sample into the Yamaha as AUDIO. I could multi sample each note like on a hardware sampler. Also, if you selected two samples, and used Delay + pan (left for one sample and right for the other), I found myself getting a VERY convincing sound, that I didn't think was possible from a mono sampler. It really sounded good indeed (The "Voices" were better than the internal ones when I finished with them). I didn't have it too long, as I upgraded to a Roland Piano Arranger, but in the short time I had it (couple of months or so), I spent a lot of time on this Yamaha. No, it’s not an Akai S5000, but it can be put to MUCH more use than adding “barking” sounds, and if you map them right, they will have more Bite too

J5