Hi Digger,
I'm also running Sonar 1.31 with a Yamaha PSR keyboard (PSR2000). Are you recording everything to Sonar via midi or digitally (via audio outs of your 740) via the soundblaster card? Do you have the 740 Cakewalk instrument file installed in Sonar? Btw, the Cakewalk instrument definitions file works equally well on Sonar.
You can download the PSR740 instrument definitions file here:
http://www.crestonhall.com/music/insdef/PSR740.ins Instrument definitions file installation instructions:
http://www.crestonhall.com/music/insdef_help.htm Digger, you say your song sounds 'like crap'. I wonder if your Windows record input/output levels (speaker icon in system tray) are set properly? Please provide more details about your recording setup, method, and settings so we might be able to better assist you.
Scott