Well, what you are going to have to do now is extract all the portraits into a temporary folder just for the portrait big files. You can do that with bigGUI since you can select all the files and then export. Then get
EAZIP and
EAGE, if you don't already have it. Put eazip in the temporary folder with the portraits. Create a new text document in that folder and name it "cmd.bat", right click it and click edit. It will open in notepad and type cmd.exe and save the file. Double click the cmd.bat file and it will open a command prompt in the temporary directory that you created it in. Type-
eazip -u *.big (uncompresses all the files just in case biggui didn't)
and hit enter.
When it is done, type-
eazip -c *.big (compresses all .big files)
Now, open EAGE. Use the Import Wizard. Select "Add files to an external TAR archive." On the left click browse, find your temporary directory and in the box type plyrprts.viv and click open. On the right click "add" and select all the BIG files in the temporary directory by clicking on the first one, scrolling to the last one and holding the SHIFT key and clicking on it. Then click open. Click "next" and EAGE will create a new portrait viv file for you. Once it is done, rename the old plyrprts.viv file to back it up and move the one we just created from the temporary directory into the FE directory. Play the game and you should be fine.