Hmm, those mods don't really have folders, some how they both go to the same folders in the default mods directory when extracted so i don't really know.

There are planty of Sub-folders in the Default Mod folder. If the mods you downloaded do not have any folder structure you will have to put the files by hand in to the according subfolders of your Default Mod Folder.

To find out what file of the mod belongs to which folder you probaly need to take a look at the Readme of the mod.

For Example the Models and Textures (.X and .PNG files) will go to the Gfx/Models subfolder. If both of your mods habe them, both go to the Gfx/Models of the Default mod folder - you basicly creating a mix from the two or more mods... This works fine as long as the mods do not have Duplicate files creating conflicts.

This obviously assumes you have got to the point where you have put mods into the game.
If you haven't, go to the DA mod folder, copy and paste the folder in there called "default" and rename it to something else, and then copy and paste everything in GP mod into the renamed copy of default. In the renamed folder there will be a file called moddescription. Open it with notepad or something similar, and there will be some text, with the name as default or something. Just rename that to the same as what you named the overall folder.

Load up the game, make sure you have the options set to check for mods, and you should see your newly added named copy of "default" but with GP's stuff activated.

I know it's a very quick and perhaps not to clear description of what to do, but if you have a gander about the mod folder, it should make sense. I sussed it out pretty quick without asking anyone... the game really is quite simple to mod. But as you can tell, people are always happy to help.

could you put muliltiple mods into that renamed folder and have them work?

As long as the mods dont share certain files, you can mix them. otherwise you'd have to cut bits out of one file and paste them into the other. And that doesn't mean it will work well.

The fun thing with this game is that it's easy to mess around with, and you always learn something.