It is impossible to change the weight of anything in oblivion.
you go to falconreech and go into the weopon shop and make your own weopon
Triton
construction set
No, that is a PC only feature.
if youre asking if you can make your guy fat, no.
The Fist
Varies by jurisdiction.
its a aztec weopon
Yes, though occasionally the character travels to the Realm of Oblivion, and once to Henantier's Dream World.
the tes4 construction set is not included in The Elder Scrolls 4: Oblivion game of the year edition but you can download it from: http://www.elderscrolls.com/downloads/updates_utilities.htm
yup, but you wont have any textures/models/objects/scripts or events, you have to make em
Tools plus metal