i really like dust but sprint and bullet time doesnt wanna work, they arent even showing up in the pipboy.

Have you tried reinstalling them?

1. Use archiveinvalidation in NMM

2. Use the modmenu maybe you can fix it with it. Or if you cant fix it try this

http://www.nexusmods.com/newvegas/mods/59201/?

This Mod include a implant that is the same like bullet time and perhaps a sprint mod. Sorry for my englisch, i hope i could help you.