Squallff8,
Can you just erase the polygons for Tifa and the Driver?
Then you could add the parts for two new models.
If you make the new models just slightly larger, they'd cover up any remaining pieces of Tifa and the Driver.
I figured out how to fix those broken Rebuilded models.
    Repairing Squallff8's Rebuilded Models
    TOOLS: Kimera, Biturn, Notepad
    WARNING: DO NOT COPY AAFE.A, AFIB.A nor AAGA.A
        Old Man 4 - Normal (edjd) ... 0.MY REBUILDED MODELS\temp\Old Man 4 - Normal (edjd)\
            Open 'EEAC.rsd' in Notepad
            Add this text as the first line of the RSD file:
                @RSD940102
            Save and Replace 'EEAC.rsd'
            Copy and replace the files from inside \Old Man 4 - Normal (edjd)\ into C:\temp\char\
        Sumo 1 - Top Half (giha) ... 0.MY REBUILDED MODELS\temp\Sumo 1 - Top Half (giha)\
            Repeat the process for 'GIHF.rsd'
        Sumo 2 - Top Half (gjab) ... 0.MY REBUILDED MODELS\temp\Sumo 2 - Top Half (gjab)\
            Repeat the process for 'GJBA.rsd'
        Wrestler 3 (TEMP) ... 0.MY REBUILDED MODELS\Wrestler 3 (TEMP)\
            Repeat the process for 'DNEE.rsd'
        Mr. Coates - Normal (fved) ... 0.MY REBUILDED MODELS\temp\Mr Coates - Normal (fved)\
            Repeat the process for 'FVFC.rsd'
            Open 'fved.hrc' in Notepad
            Make the following change:
                head
                chest
                11.87068
                2 FVFC FVFC
            Save and overwrite 'fved.hrc'
        Punk 2(TEMP) ... 0.MY REBUILDED MODELS\Punk 2(TEMP)\
            Open 'CVCA1.P' in Kimera
                Double click the model to open it in the P Editor
                In Groups select Group 1 and click Group Properties
                Set Blending Mode to None and click Apply
                In Groups select Group 2 and click Group Properties
                Set Blending Mode to None and click Apply
                Save and replace the file
            Open 'CVCA11.P' in Kimera
                Double click the model to open it in the P Editor
                Save and replace the file
            Open Biturn
                Select 'CVCB.tex'
                Set Destination format to Bitmap (.BMP) and click Convert!
                Select 'CVCC.tex'
                Set Destination format to Bitmap (.BMP) and click Convert!
            Open 'CVCB.BMP' in Image2Tex
                Click Save Texture and Replace 'CVCB.TEX'
            Open 'CVCC.BMP' in Image2Tex
                Click Save Texture and Replace 'CVCC.TEX'
        Punk 4(TEMP) ... 0.MY REBUILDED MODELS\Punk 4(TEMP)\
                Rename r back boot.P to CWCA3.P
                Rename r back boot1.P to CWCA4.P
                Open 'CWAF10.rsd' in Notepad and change 'r back boot.P' to 'CWCA3.P' then save and overwrite
                Open 'CWAF101.rsd' in Notepad and change 'r back boot1.P' to 'CWCA4.P' then save and overwrite
            Open 'CVHE12.P' in Kimera
                Double click the model to open it in the P Editor
                In Groups select Group 1 and click Group Properties
                Set Blending Mode to None and click Apply
                Save and replace the file
            Open 'CVHE11.P' in Kimera
                Double click the model to open it in the P Editor
                Save and replace the file
        Man11 - Normal(TEMP) ... 0.MY REBUILDED MODELS\Man11 - Normal(TEMP)\
            For each .p file: 'FNFD11.P', 'FNJA1.P', 'FOAA1.P'
                Open in Kimera
                Double click the model to open it in the P Editor
                Save and replace the file
            Open 'FNFF1.P' in Kimera
                Double click the model to open it in the P Editor
                In Groups select Group 1 and click Group Properties
                Set Blending Mode to None and click Apply
                In Groups select Group 2 and click Group Properties
                Set Blending Mode to None and click Apply
                Save and replace the file
            Open Biturn
                Select 'FNGA.tex'
                Set Destination format to Bitmap (.BMP) and click Convert!
                Select 'FNGC.tex'
                Set Destination format to Bitmap (.BMP) and click Convert!
            Open 'FNGA.BMP' in Image2Tex
                Click Save Texture and Replace 'CVCB.TEX'
            Open 'FNGC.BMP' in Image2Tex
                Click Save Texture and Replace 'CVCC.TEX'