AutoCAD Inventor :: Creating New Drawing Sets From Existing Ones

What it is, my client has asked me create 4 different size transit frames all similar in design. Now I use the skeletal modelling technique to create all my models and this one is very easy to edit, all I have to do is change a couple of sketch dimensions and the transit frame assembly will update to suit any given size.

So, I have completed the drawings set for the first one (There is about 7 drawings in total, each containing about 5 sheets), and I would like to just copy the whole assembly and drawing set for the next frame, and I would just change the dims in the main sketch to suit the new size of transit frame that is required, BUT I dont want to alter the original frame.

Usually to do this, I would create a pack n go then open up that pack n go project in design assistant and change all the names of all the files, then place all these files into another project.

Now doing this is VERY time consuming, as if I am renaming all the files, then I am going through around 1000 files to do so!!!Even after I do all this I still run into some problems with assemblies looking for part files or idw's still picking up and showing the old project assemblies.

Is there an easier, more efficient way of doing this?Also, I would like to add that each of the 4 transit frames would have their own project BUT all 4 projects will be inside 1 parent folder within the vault. This is just the way that we structure or file system as each folder is for the entire job.