First of all, AFC's and PCC's. It is a nonsense to make a full list, but remember this key:
LANGUAGE-relevant AFC's and PCC's have _INT in filename for English version. If you want English-only, delete any and all that have identical names to the English ones but different language suffix (like _DEU for example). Do NOT remove any files that have no language suffix!
As for a tool to edit SFAR files, use this:
http://sourceforge.net/projects/me3e...d?source=files
One word of warning though: DO NOT EDIT THE MULTIPLAYER DLCS! (DLC_CON_MP#) I do not know how far does the EA protection go, but they stated that modifying files relevant for multiplayer might ban you from MP. SFAR files MAY be investigated by checksum so don't remove any language files from these four. You'd save 100-150 MB MAX, so it's not worth it.
Single-player DLCs are quite another matter. I decreased Leviathan's size for about 500 MB....
EDIT:
@REV0:
AdvCombat are the biks with tutorials on how the Mass Effect 2 combat system is to be used for maximum efficiency. There are six files in total for the PC version:
- AdvCombat1.bik
- AdvCombat2.bik
- AdvCombat3.bik
- AdvCombat1_PC.bik
- AdvCombat2_PC.bik
- AdvCombat3_PC.bik
As they demonstrate something the XBOXers call the Power Wheel, it is obvious that only one version is used. The ones without the _PC suffix demonstrate the X360 ui and therefore are unused ingame.