I need to create more faces( but ctrl+r in edit mode isnt working), how do i do it alternatively? I downloaded a model from a website and got permission to use it for non profit/open source projects.

Problem is that I cant use Ctrl+R to divide the faces into smaller multiple faces.

If I use W> Subdivide I get more or less the result I need (far from perfect but it can/could work), but the faces have triangles inside them, causing too many faces that wouldnt crash realistically. Is there an alternative to Ctrl+R or a way to get Ctrl+R working again and remove triangles inside the faces (whithout deleting the faces) where I dont need them? If I remove them manually using X then W> Subdivide wont create vertical edges I need.

I cant use Ctrl+R to do it, any alternative way to do it? If I use knife to do it (easiest way) the edges I get are not vertical.

If I use W> Subdivide I get too many diagonal edges from my current diagonal edges (most of which I dont need, but if I remove them then W> Subdivide does nothing.

Any ideas how to fix it?

This is what I want:




This is what it should look like(12+ or so little square faces per body panel):
You might want the Knife tool (the K tool in edit mode).  https://docs.blender.org/manual/en/dev/modeling/meshes/editing/subdividing/knife_subdivide.html .  It lets you divide faces along a line you choose.

If you decide those vertices aren't in the exact right place you can use Vertex Slide Shift+V to slide them into the right place.
If that model's triangulation is a problem and you want to turn them back into quads, consider the Dissolve Edges operator (in the X menu.