It's the basic trouble with all "Texture CDs" and there is very little that can be done to fix that issue.
Even so called "themed" texture collections (which are almost non-existant) fail miserably because the look is too pre-determined. You're lucky if the design matches your visions of the game or you have adapt your vision to suit the textures. And if you need something that isn't in the collection you're stuck... this assuming that you bought the collection because you can't do textures yourself.
The only GOOD and working way is to make all your textures (or hire someone capable of doing those). And it's the same with models... it all comes down to keeping coherent look in the game, you just can't go and buy loads of texture and model CDs and expect to get a nice looking mix out of them.
Even so called "themed" texture collections (which are almost non-existant) fail miserably because the look is too pre-determined. You're lucky if the design matches your visions of the game or you have adapt your vision to suit the textures. And if you need something that isn't in the collection you're stuck... this assuming that you bought the collection because you can't do textures yourself.
The only GOOD and working way is to make all your textures (or hire someone capable of doing those). And it's the same with models... it all comes down to keeping coherent look in the game, you just can't go and buy loads of texture and model CDs and expect to get a nice looking mix out of them.