So for instance, I could use Vurt's grass mod, and even though it's made for Vvardenfell, I can use that grass for other continents I might create?
this is a bit more information about it
* How does Yacoby's Mesh Generator work?
The program will place meshes randomly on the landscape, based on texture placement, based on the heightmap of the esp, and based on settings you input. So you can tell the program to place for example...grass_01.nif on tx_bc_moss.tga, as well as how randomly to place it and how often, then run the generator. It will go through whichever mods you want it to and place grass accordingly. So for this mod I generated grass on average of 3-4 textures per region. Note that this program can be used to place any kind of mesh and not just grass, for example trees, rocks and other kinda of flora. You will be able to use the Mesh Generator to generate grass onto any landscape mod such as Tamriel Rebuilt, Ald Vendras, Havish etc
i found this information located here. http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=7762