I was wondering if the old songs he put on his site are still there for downloads or have they all been removed and replaced with the new stuff.

Most of them have been re-packaged as the two download compilations: Choc. Invasion and Slaughter House - they have most of Year One songs on between them.

There are a few missing songs, and the NPG Ahdio Shows are not available.

Basically ur missing the following Prince songs (although other related items were also available):

Habibi
Mad
Splash
The Funky Design
Instrumental (Contest Song)
My Medallion
Van Gough
Madrid 2 Chicago
Poor Goo (Live)
The Undertaker (Live)
We Gon' Make It Funky (Live with Maceo)

Also there are slightly different versions of the following (which were re-worked for this years release):

Northside
Sex Me Sex Me Not
SM Groove
Silicon
Vavoom

Hope that helps!