Tell us what the problem is here so we don’t have to go bouncing around the internet to figure out what you are talking about. Also please use the appropriate support forum rather than just using the first one you see at the top of the forum. Moved from ‘General Forums / Blender and CG Discussions’ to ‘Support / Materials and Textures’
General comments to consider (no blend file supplied so won’t give specifics)
Objects can have multiple materials so you don’t have to have all the faces on a single UV space
What is the problem using all the UV space
You can scale the uvs outside the uv space and the texture will tile
You can get more detail from a higher resolution texture