So you want to make an enchantment too? It's your funeral

...
1) Load up the CS
2) enable both the oblivion file and your mod, select your mod and click 'set as active file'
3) go to the Enchantments tab
4) Right click on the menu and select 'new'
5) Type in an ID, this can be anything
6) Select your enchantment type, if it's going on your weapon select Weapon, if its going on your armour selct 'Apparel'
7) Right click on the list, hit new
8) Select any effect yyou want your enchantment to have, i.e if its for your weapon you would maybe want fire damage or drain fatigue or w/e
9) Set the range as 'touch' if your putting it on a weapon
10) set the 'area', this is the area your enchantment effects, i.e if you put 10 it would affect everyone within 10 feet, if putting it on a weapon i would put 0
11) In the 'duration' box put the time in seconds you want your effect to work
12) In the magnitude box put the power of your spell, i.e. if you put 30 it would do 30 points of fire damage
13) Leave the ActorVal box empty
14) click 'ok'
15) open up your custom weapon and in the enchantment box select the ID of your enchantment.
16) click save
17) Save your mod. You should now have a custom weapon with an enchantment.
hope that helps