Unable to save game in RP 2.1.1

[VicTT]

I tried searching the forum for similar posts, found someone that said he copied the contents of the data subfolder of data into the root data directory, tried it, didn't work.
My master.dat was modified when I ran at around 3-4+ minutes after I ran the installer, although I can't be absolutely sure about that since I installed both a clean Fallout 2 and the RP in the same day.

I am running Windows XP Professional SP 3, humongous Fallout 2 install.

EDIT: I don't want to do the Temple of Trials again. Please help and thank you in advance

Additional information: my master.dat has 333,098,808 bytes as opposed to the original fallout 2 1.0 cd-version that has 333,098,563 bytes, so I'm basing my assumption that it has been modified by the installer on this too. Can anyone confirm?

 

[VicTT]

UPDATE: Seemingly solved after overwriting partially-modified master.dat in fallout folder with CD version, downloading manual install version, copying batch_work directory to fallout 2 folder and executing f2.bat.
For future reference: Correct master.dat size on my system is 333,099,269. This also fixes a few 'quiet' bugs like critical hits for no damage (always), very buggy random number generation (much lower chances of hitting than advertised and long loops of misses), and the most obvious one being a huge slowdown of fade-in and fade-out (both in main menu and after using first-aid or doctor in-game).
Hopefully, anyone running into this problem will be able to find my thread and not go through the amount of frustration I went through.
Fallout 2 version identification information:
CD contains folders: ALTERNITY, MINDSPRING, PROGRAM
CD contains (relevant to version comparison?) files with sizes: CRITTER.DAT (166,951,131), MASTER.DAT (333,098,563), SETUP.DAT (221,065), SETUP.EXE (297,472).