So i did end up purchasing Garritan (thanks for all who steered me in the right direction!) I was really excited about the ability that Garritan offered to change velocity and attack with the mod wheel, I know it will make expression alot easier to control. The problem is I am using a YPG 235 keyboard, and It only has one mod wheel on it. As of right now that mod wheel is set to pitch bends (the default) I know that under preferences I should be able to set the mod wheel to the velocity/attack setting, but I'm not sure how. I tried clicking "learn mode" and then activating the mod wheel which did bring it up. I just couldn't figure out how to set it to the right parameters. In the Garritan manual it used the terms CC#17 and CC#1 ETC for controller assignments....Am i looking in the wrong place? thanks!