the psfreedom 1.0 has the .sys calls lev2
quote from kakaroto´s blog
"The new release of the PSGroove yesterday also adds 2 system calls that allows user space application to modify the GameOS kernel, and that meant a new payload is available for developers. This version of PSFreedom provides all these payloads and you can choose which one to set by simply copying it to /proc/psfreedom/payload once the module has been loaded. The same also applies to the shellcode."

I don´t think it should be compatible with 3.42