I HIGHLY doubt Money Money has anything to do with Cigarettes and Valentines at all. I mean does that really sound like what you think Green Day was gonna release after Warning? And the song C&V sounds nothing like The Network. And I also don't believe the Walk Away we know is from C&V, it's not really my favorite or anything but it does sound like it was written for the trilogy, it fits right in, especially on Tre.
* About your first question: Why not??? Some parts of the record sounds kind of old school Green Day style (especially roshambo). It sounds so different just for the synthezisers effects on this record.
* This record was release on September 30th in 2003, little bit time later after the band started to write the songs for AI.
* WhiteTim have said in 2010/2011 Mike Dirnt had said there was a song called "Walk Away" in C&V Sessions. I don't think is exactly the same version or the same song. Maybe the band just do another song with the same title or they re-recorded the song, who knows? I think that's the reason why some people relate this song to C&V Sessions.
No, just no. There's no way anything off of C&V made it onto Money Money 2020. The styles are just too incredibly different, none of the songs on Money Money 2020 fit with the theme C&V seems to have had, it's just improbable to the point of absurdity.
Synthesizers and some few changes on structures or arrangements in the songs and that's it, you get a different sound (Did you notice how similar is the song "Spike" to a demo from 2001-2002 called "What about today?"?). I know time ago the band and/or Rob Cavallo said C&V was a mixture between Nimrod and Warning, but I don't think that record was just like that (Personal opinion/observation: They always since "Kerplunk" release at least 1 song which is different to the sound of the rest of the record) If there's something I learned about this band is that EVERYTHING is possible. Maybe they were working on this project 2 or more years before, maybe it was an interval between C&V and AI or just a random idea which was developed in few sessions/weeks (Like Foxboro's project).
Who knows? That's just my humble opinion about the known facts.
Well, let's talk about another thing. First I love the title for this new thread and second (and here's my unpopular opinion/Blasphemy): I don't like Sam Bayer as Green Day videos director (Except AI and Holiday), Mark Kohr videos were more simple and funnier.