Laminate flooring is a great flooring option because you can have the beautiful look of a hardwood floor without all the maintenance. There is no reason that you cant put laminate flooring in your modular or manufactured home.
"Every laminate flooring manufacturer has their own installation procedures. We strongly recommend you read, and follow, the manufacturer's installation procedures for the flooring you purchase. You may notice how similar they are, yet there are subtle differences in certain aspects such as gluing. It is important to realize that failure to follow the instructions supplied by your manufacturer, or failure to use their recommended products may void their warranty.
Although each manufacturer has their own guidelines, here are a few things common among all. First, you need a level, no bounce sub floor to lay the planks over." (See the free article Laminate Flooring Installation Tips
"The beauty of a floating floor is in its adaptability. A floating floor can be placed over nearly any substrate, including concrete, wood subfloor, or existing flooring. The floating panels can mask some irregularities in the substrate, such as embossing in vinyl flooring, but any major dips, dents, or lumps should be eliminated before installing the panels..." (See the free article Install a Floating Floor
If you are covering the marriage line between 2 sections it is a good idea to relevel the home and put a sub floor down in the rooms where you are going to bridge the marriage line. This is to insure that possible future settlement at the joint line will not cause your flooring to buckle or crack at some later date. The sub floor can be quarter inch plywood or ask the laminate supplier or manufacturer what they recommend under their product.
Sixteen years ago I installed Italian ceramic time in my double wide. We went the extra step of removing the plywood floor decking around the marriage line and reinstalling it across the joint line. I dont think I would go that far unless you are in an area where the soil permits long term noticeable settlement.