Credit goes to vorte[x] for the original hex edit to disable WFP. I added mine to change the registry setting.
Ok. Well, after a couple of more tries, I have finally fixed it.
This modified file works EXACTALLY the same as my other one except it uses the SP2 RC2 sfc_os.dll rather than the SP1 sfc_os.dll so no campatibility problems should arise.
To use it, simple replace the sfc_os.dl_ file on your Windows XP SP2 RC2 CD with the one attached here, then, edit HIVESFT.INF and add the following line after "SfcQuota" (search for it).
That's it!! You have now disabled WFP for good. If you want to re-enable it, change the above registry setting to 0x00000000 rather than 0xffffff9d. Simple.
Hope you all enjoy my work.
BTW... this file has been modpe'd and compressed, ready to go onto a CD.