The R9203 should be a simple FB to ground mod.
(pin8 (FB) to pin3 (GND) or other appropriate positions)

If you follow the traces from the pin you should see the resistor devider.. and that will give some idea of what VR to use.
If you cant just start at 500k or 1mo and work down.. slowly.

On the 2226B its a similar story.
This time FB is pin4 gound is pin 6, again solder to the easyest place, following traces if necicary.
Again, start with a big VR (500k or 1mo) and work down slowly.

There is also overcurrent via pin2, its not well explained in the PDF but If you think you are tripping the overcurrent lift pin2.
This is usually unnecicary for vga mods.