Well... Sorry, I should probably have replied this post earlier!
I guess I would have to guide you there, since I must be the guy who made the largest amount of FF7 field scenes with Blender. Currently, it's at the heart of the Team Avalanche project, so you're welcome to check the corresponding subforum if you haven't yet.
Generally, if someone wishes to make field scenes for FF7 using Blender, while being new to Blender, here's what I suggest: first, I recommend the user to get familiar with very basic controls in Blender, as some may not be very intuitive. For the most basic stuff, I recommend the user to browse
this wikibook. I also recommend the user to browse some of Andrew Price's tutorials at
blenderguru.com. Once the user has a grasp of the basic tools, he/she can take on the creation of a FF7 field.
There is a step by step procedure to do it, and generally I was walking newbies through it, mostly with PMs. I haven't made a thread fully dedicated to specifying every single aspect of the procedure (I can do it though, when I have time). The procedure can be summarized as follows: first, the user needs to prep the scene by retrieving the walkmesh and the camera data from the field file, using SpooX's Shinratool. Then, the original image is to be placed as background, and the scene needs to be rescaled (by taking large objects as a reference for dimensions). Then 3d modelling, texturing and lighting can begin, and obviously that's the core of the work. Finally, once the scene is finalized, some work is necessary to get the proper render layers, which would be combined with the tool Palmer in order to reconstruct the field file.
As a sidenote, I would like to mention that I have already made a "screening" of the field scenes to evaluate which are the easiest to do, so that newbies would tackle them. For a newbie, it is often best to first try a small, simple indoor scene. One has to learn how to walk before learning how to run.
For more details, I invite you to ask your questions on the Team Avalanche subforum or PM me.