Hi,
there's user manual in the package - GeneralMarketDriverForMPC555UserManualV1.0.4.pdf
and there are also SW examples.
If you are developing flash programming tool, you can take a look at:
https://www.nxp.com/docs/en/application-note/AN3283.pdf
It's written for MPC55xx, so it's different, but just to get an idea... See section 5 Creating the Flash Programming Tool.
Regards,
Lukas