Really basic, stupid question I should just look up myself...
 

I am CO Silver. If I book a flight on CO metal, but request credit to my Worldperks account, will I still get upgraded due to my Silver status?

I can't figure out the rules...

Welllllll not really.... your CO number has to be in there for you to be eligible for your Silver Upgrade. After you get the upgrade you can try to change to your WP number, but some have stated that the CSR will make you forfeit your upgrade ifd you try to change the program. Try to check in at either the kiosk, or on-line. I believe both will let you put in a different FF number, without forfeiting your upgrade.

It had been reported in a few threads here that CO CSR's are "annoyed" at people trying to "escape" the clutches of One Pass, and make people give up their upgrade and sit in the back.

Good luck. We hope you make it over the wall.