Users of the Cakewalk software programs will need an instrument definition file for their particular keyboard.
This page lists Instrument Definition Files for a number of Yamaha Tyros, PSR, CVP, DGX and YPG keyboards. Collected from various sources. Thanks.
Please notice that I do NOT check the files. Please contact the creator (normally shown in the file) for error handling.
Furthermore you will find links to sites explaining the use of the files; and how to create an ins-file yourself.

PSR
PSR 140
PSR 280/282−GX 76
PSR 292
PSR 295
PSR 340
PSR 530
PSR 540
PSR 550
PSR 620
PSR 620 GM
PSR 630
PSR 640
PSR 730
PSR 740
PSR 1500
  PSR 2000
PSR 2100
PSR 3000
PSR 3000 (Rev.)
PSR 4000
PSR 8000
PSR 8000/9000
PSR 9000
9000 PRO

PSR S
PSR S500
PSR S650
PSR S700/S900
PSR S910
PSR S950

  PSR ...
B 50
PSR E303
PSR A3

Tyros
Tyros
Tyros 2
Tyros 2 (StyleWorks)
Tyros 1/2/3/4

CVP
CVP 103/105
CVP 107/109
CVP 309

  DGX
DGX 200
DGX 205
DGX 300
DGX 305/505
DGX 520/620−YPG 525/625
DGX 630

Resources
Creating Cakewalk Instrument Definition Files
How to write a Sonar ins File
Use of Instrument Definition Files
INS Maker