What was Theo Bidens' contributions as keyboard player in Wenge BCBG before leaving them for Quartier Latin to end up a few months later in Alain Mpela's Generation A?

In the credits of Internet Philippe Guez is mentioned with Theo Bidens among the keyboard players next to a guy named Erick (I don't know if it was the keyboard player next to Theo Bidens that went on tour with BCBG in 2000 and ran away). In TH, Theo Bidens wasn't even credited, which made me wonder if he did even play keyboards on the album. Titanic unfortunately didn't had credits, so we don't if next to Makaba and Theo Bidens another one participated as keyboard player (Al Nzimbi or Philippe Guez) on that album.

Did JB Mpiana invite Philipe Guez because of not having much faith in Theo Bidens despite all his work and arrangements in albums recorded at Studio Bobongo ? Or was it because of JB Mpiana wanting to have the best results ?

I remember journalists voting Theo Bidens as best keyboard player of 2001, thinking that he did all keyboard work in Internet.

That's actually a good question. I thought he played keyboards on the sebenes and non-JB songs, there was no room for him on JB's songs.

 he played on th the sebene songs,guez played aminata bye bye julie germando  and songs like that
in internet it was a bit of the same,the more "technical" songs went to guez,sebene went to theo and jdl also played one song in studio

What about the guy called Erick ? Did just had the role respond to Theo as a solist ? Is he the same guy who played at Bercy and participated to the 2002 tour or was that Cedric Guez