diff --git a/README.md b/README.md
index 588d068..c867aea 100644
--- a/README.md
+++ b/README.md
@@ -65,8 +65,20 @@ root folder contains all files of the unpacked AFS
 sys folder contains AFS system files of the game and generated files needed for AFS operations:
 * tableofcontent.bin - TOC sys file: You can edit this file it will be handled by the --pack command.
 * filenamedirectory.bin - FD sys file: This file is created only if there is a FD in the AFS.
-* filename_resolver.txt - Created when multiple files have the same name in the FD.
-* rebuild.conf - Not implemented yet.
+* filename_resolver.csv - Created when multiple files have the same name in the FD. New names use "filename (N).ext" format with N:Integer.
+* afs_rebuild.conf - Edit this file for rebuilding the AFS.
+* afs_rebuild.csv - Edit this file with correct values set in afs_rebuild.conf for rebuilding the AFS.
+
+### afs_rebuild.conf & afs_rebuild.csv
+
+files_rebuild_strategy is used to organise files (indexes, offsets) in AFS. The strategy use informations in afs_rebuild.csv autogenerated during unpack. 4 strategies are available:
+* auto: Rebuild all files indexes and offsets with custom sort. afs_rebuild.csv indexes and offsets will be ignored.
+* index: Keep the specified index for designated files. afs_rebuild.csv offsets will be ignored.
+* offset: Keep the specified offset for designated files. afs_rebuild.csv indexes will be ignored.
+* mixed: Keep the specified offset and index for designated files.
+afs_rebuild.csv contains entries describing how to pack files in the AFS. All int values are stored in hexadecimal: 0xabcdef. Offsets have to be aligned to 0x800 (2048). Put one line per selected file that you wan't to constraint using this format:
+* unpacked_filename/index/offset/packed_name
+For instance: "dummy (5).bin/0x12/0x80000/dummy.bin". You can put "auto" to index or offset when you want set the packed filename: "dummy (5).bin/auto/auto/dummy.bin". For an empty block add only index/offset couple: "0x12/0x80000" (Not implemented yet). First remove all files without constraints from afs_rebuild.csv. Then put auto in indexes, offsets, and names that doesn't have constraints.
 
 ## pzztool.py
 Python3 script for unpack/repack unpzz/pzz and uncompress/compress of PZZ archive. MDT files are also handled by pzztool.py.