Camera and matrix transforms don't seem to mix intuitively

i want to get the current projection matrix and store it to a variable so that later i can reuse it ,
i can try this :

```
float * matrix;
GPU_PushMatrix();
matrix = GPU_GetProjection();
...
//here i want to set the projection matrix to "matrix"
```

how to do that ?
i mean i looking for an equivalent to "glLoadMatrixf(matrix);"
