This mod from Christian makes it so the armor doesn't degrade and adds artifact slots in the beginning and allows you to run with all armors.
Non-degrading Armor & Extra Armor Features v1.0 for S.TA.L.K.E.R. - Clear Sky v1.5.04 (European Version) - by Christian "CW"
This mod should work with all versions of the game. It works without starting a new game and it works with old savegames.
Every armor (normal and unique, correct me if I am wrong...) of the game is indestructible.
- Every armor has 5 artefact slots right from the start, so no more need to buy artefact slots.
- No armor prevents the player from running.
Unzip "Non-degrading Armor & Extra Armor Features v1.0" and copy the "gamedata" folder and the "fsgame" file into your stalker directory.
If you already have a modified "items.ltx" file then just compare my modded version with you version and check what I have changed. No big deal.
Feel free to use this mod any way you like, just do not forget to credit me.