The plastic tiles are from an online outfit called "BigFloors.com"
GarageDeck Garage Flooring - BigFloors
I received a private message with some questions about the post I made above, and I thought that it would benefit everyone if I answered it here instead.
Each tile is 12" x 12" -- one square foot. The tiles themselves are approximately 1/2" thick. The bottom of the tile is a cross-mesh support grid.
Unless your shop floor is dimensioned exactly on one foot boundaries, you will need to cut the end row of tiles. Cutting can be done with almost anything -- I used a power miter saw but you could use a jigsaw with a guide, or even a hand saw. One note: unlike real wood, the plastic "sawdust" is of course not biodegradable -- so I connected my shop-vac to the miter saw to collect the trimmings. Otherwise you will be left with a tile-colored reminder, forever, of where you cut the tiles.
Each tile has a pair of male edges, and a pair of female edges. I hope I don't have to explain to all of you how all of this works.

All tiles are set in the same direction. It will probably be easiest to start with the female sides against a corner, and then work outward. You can see my example pictures above. This means you will eventually be cutting off the male edge(s) at the far side of the room. Remember, measure twice, cut once - and double check the "***" of the side you are cutting. I would try to put the full tiles where they are most visible, and put the cut tiles where they are least visible, say under a workbench or similar.
Attaching adjoining tiles is as simple as placing them into position, and then giving the seam a whack with a rubber mallet. If needed, you can disassemble tiles as well using a screwdriver to unlatch the male/female bits.
Regarding the edging shown in my photos -- they require a virgin tile; in other words, they attach to the adjoining "parent" tile using the same male post/female hole scheme. So if you are going to attach edging anywhere you have to make sure your layout approach leaves a virgin (non-cut) edge for the edging to attach to. The company that I bought my tiles from sells the edging in both sexes, so you can finish a male edge or a female tile edge.
One final note... all plastic floor tiles expand and contract with changes in temperature. So, leave sufficient expansion gap (approx. 1/2") along all walls, otherwise you may end up with a "bulge" in the middle of the shop on a hot day.
Wrooster