I use that program myself for all the sample libraries I create.
http://www.irishacts.com/ezypal/index.php Funny enough though the programs main feature is not just converting samples from one format to another regardless of the applications title, it's actually it's ability to sample is where it really does it's magic.
This program can load VSTi's and at high speeds, digitally sample any sound selected into any format you need. It can even sample any keyboard connected to the midi port and audio in of your PC.
You just set the notes you need to sample, and the program samples the sound automatically and creates the multisample. For the most part all your left with is the need to loop the samples, which I might add is rather simple.
I did a little video on looping samples with this program here.
http://www.irishacts.com/misc/looping/loop.swf Regards.
Sharp.