Approach Civil Cell/3d Linear Template

I'm using Power Geopak V8i SS10. Very new user.

I am attempting to model depressed approaches into my design and need some help. I've attached screenshots to aid.

I attempted to create a civil cell of the approach (a simple approach at that) and I could not get it to function properly. I attached the picture of the end goal, mind you, I am not even trying to model behind the back of walk. I was thinking rather than creating a civil cell as I have different approach widths to apply, can I create a template for the full size curb and one for the approach and then transition between then two? If so, how do I transition between two 3D linear template?

If this is highly discouraged, is there anyone out there that could break down an explanation on how to create this civil cell? I understand that all of it needs to be created with the correct relationships but that's where I am struggling. Especially using multiple reference alignments to adjust the width of the approach.

Please help and thank you!!