Your question is clear, but unfortunately the answer is, not really. It depends a bit on how you have structured your details / layouts. If you have Make2d -ed your geometry, and your layouts consist of details of that make2d work, then it is easier. If your details are looking at bits of the model itself, you will have to make2d them first.
Once you have everything represented by line work, what I like to do is first save a copy, because invariable I destroy the model in this process. For each detail, double click into the detail to make it active, select everything you see, copy inPlace, testChangeSpace (this will not autocomplete, you have to type it all out, in V6 it has been promoted to ChangeSpace). This will suck all that line work into layout space. You will probably have to trim up the results. Once you have done this for all the details on the sheet, delete all the details on the sheet. If you did everything right, it should look the same, but now everything is in layout space. Quickly hop back into model space, hide everything so it doesn’t get in the way, and back to layout space. Create a new detail on your recently denuded layout which is now devoid of details. It should be top projection, and the snapped to the corners of your sheet so it is the size of the sheet. Once placed, change its scale so it is 1:1. Select everything in the layout, and testChangeSpace again, you will be asked to Select target detail view, select the new detail you just made. This will blow everything back to model space. Change back to model space, select the sheet that should now exist there, move it to where you want it, then export DWG. Rinse and repeat for the other layouts.