Is there a driver or some other way to be able to use all of the sounds from my PSR630 keyboard in cakewalk, or will I just have to live with the sounds available from my soundcard?

Hi Brad
There probably is a Cakewalk .ins file available for your 630. I suggest you join the Yamaha Yahoo group. A very helpful bunch of people - and you will find all kinds of good advice & files. Sign up for it at: http://groups.yahoo.com/group/yamaha-psr-styles

Also checkout this great Yamaha site: http://home7.inet.tele.dk/js/musik/740pages/

Tom