I am currently obsessed with downloading music, but hit a snag. When a song is a remix, who gets the credit as the artist? I'm trying to stay away from "Kiss ft. Barry Manilow" but I want to give credit to both artists. Any ideas?

When it is just an artist with another artist assisting them, I usually have it:
Title ft. Other Guy - Artist

When it is a remix of a song by a different artist yet still on the original artist's album, I have:
Title (Other Guy Remix) - Artist

When it is a remix of a song by a different artist on his/her own album, I have:
Title (remix or whatever) - Other Guy

However, I generally follow the titling of what the album says in the liner notes in the album booklet, or just read it up on Wikipedia.
Seeing as you download your songs, I would suggest Wikipedia.

If the remixing artist is still an underground phenomenon and yet to have much info on Wikipedia, just read the liner notes on their website/Myspace/Facebook/Tagged/ whatever.