I do think thak 'Arsenal' is just an add-on for AMK mod english release 1.4.022 with 0.94 patch - all those is mentioned for S.T.A.L.K.E.R. - Shadow of Chernobyl worldwide release and patch 1.004. Very precise requirements, and at the moment 'Arsenal' is working just with that.
There is also a patch which makes, more or less, 'Arsenal' to work with Kanyhalo's OL 2.1 but I haven't tested it myself, it can be found at FileFront ShoC - Mods - Singleplayer, I guess. There are some user comments there which you can read and then decide.
RapidShare: Easy Filehosting
- this is link for basic 'Arsenal' package
RapidShare: Easy Filehosting
- this is link for 'Arsenal" patch to 1.2
RapidShare: Easy Filehosting
- this is link for 'Arsenal' patch to 1.3
But you will also need AMK english to run them:
amkmod1.4_amk_en_setup.7z
- this is link for AMK english 1.4.022
AMK-EN _Patch_2.0.94_for_FINAL.exe
- this is link for final patch 0.94 for AMK mod english 1.4.022
So, the installation order is as follo
ws: S.T.A.L.K.E.R. - Shadow of Chernobyl GSC patches 1.0001 - 1.0003 - 1.0004 and no other mods AMK english 1.4.022 (installer) final patch for AMK 0.94 (installer) basic 'Arsenal' package (gamedata - copy over) patch for 'Arsenal' 1.2 (gamedata - copy over) patch for 'Arsenal' 1.3 (gamedata - copy over) and that should be that. If you were asking for something else, of which I cannot recall at the moment, then let someone else answer/correct me! Good hunting, S.T.A.L.K.E.R. !