Hi,
First of all thank you for your comments and sorry for my replying delay. I have followed some of your advices and cut, scale, resize, did some retouches, specifically to the model. But i have been struggling with the materials, textures and lightning. They are more complex and dificult to manage than i though. Maybe because i want them to be fairly realistic and dont know the exact paths/commands/Blender options to achieve that. I think i didnt told you the history behind this model but im trying to make an aproximate replica of an old furniture desk/commode i have in my room. Its a first half 20th century chestnut desk/commode. Chestnut was, and it still is a traditional wood to use in both popular and fine handmade furniture. Well i didnt finish the remake/overhaul of the furniture but here it goes the changes i have made:

Well it is a bit diferent from the precedent model, as you can see i have changed the materials (to chestnut) and also the textures were remade. The scenery stills basicly the same with some changes in the camera composition (angles of view, more focus on the model, etc…). Im having an hard time working with the materials and textures. What do you think? Did the changes work well? I dont know if i will maintain the same wood in all the model. In that case i suppose i should work piece by peice (in detail) to differentiate some parts from others, and dont have a block of the same textures. Ho and my current lightning setup is this:

Well i know its really simple, but im trying to find the right equilibrium. I have made an update to Blender 2.53 and im using ambient occlusion (0.60) and environment lightning (0.70).
Thank you all
Nuno