Can anyone tell me whether I can use speakers of a home theater system to hook up with regular receivers?

Speakers plus dvd player in a package like Pioneer HTS-950NXT – Home theater system cost less than a pair of good quality speakers. I have good main speakers. Just want to have speakers as Presence speakers for a Yamama system and want an extra subwoofer as an add-on to the main speaker and two surround speakers or surround back speakers. Thx

Related posts:

1. Question about home theater speakers and Blu-ray players?
2. home theater system want to run outdoor speakers. The receiver only has the 6 outputs. How do I do this?
3. can someone tell me how to hook up home theater surround sound to my 55 in big screen tv?
4. What type of adapter do I need to turn my dvd player and sattelite speakers into a home theater?
5. My home theater speakers pick up the radio in the background, are there ways of preventing this?