I don't have any crashes, except from video RAM occasionally going nuts, but I can give a quick insight on what's in each texture pack -you guessed right, they're two:
Texture Pack 01- Actors
- Clothes
- Armor
- Weapons
- Effects
Texture Pack 02- Clutter
- Interface
- Architecture
- Dungeons
- Plants
- Furniture
- Shadertests
- Terrain
- Blood
- Effects
- Trap
- Critters
- Landscape
- Sky
In short: Pack 01 has everything character/npc/mob related & Pack 02 has everything gameworld related -quite thoughtful of Bethesda, if you asked me.
What this means: You can disable either pack to use your favorite mods OR to reduce your system's load.