I have just recently started to mod Oblivioni for the fun of it. One problem that i have run into is when i change the race of my character with any of the mods that change race, i cannot get out of the prison cell at the first of the game. The prisoner across from me does not start talking to me to initiate the next scene of going through the sewers. Any help will be appreciated. Thank you in advance.

Most of the race-mods out there either require or use some variation of Custom Race Fix. Valen Dreth still won't look like he's doing the dialogue, but if you wait it out things get back on track.