Hey,
after a long and rigorous search for tools capable of extracting/ repacking TW .BIF files on the net,
I found only one site (http://www.totalwar.org/Downloads/Tools.shtml) effectively offering what I needed.
And these unfortunately, are only available from a download repository making you wait 3 minutes for each file and spamming you with ads.
I don't know how much interest there still is in these tools (expect Shogun modding to be near-dead), but I think it can still be a valuable resource.
Hence I re-uploaded the files to mediafire.
Here are the links:
Readbif_23c
Mirror: http://www.mediafire.com/download/yp...eadbif_23c.zip
Description: A tool for exporting/ building graphic .bif files from Shogun. Although not specifically built for it, it works on MTW .bif files as well.
CA_BIF_BUF_TOOLS
Mirror: http://www.mediafire.com/download/00..._BUF_Utils.zip
Description: A small toolsuite with tools for recoloring, converting and viewing .BIF files.
Greetz