When I upgraded to BB I also had the Copperjet modem and didn't have any problems with it.
I also bought a modem / router to replace the copperjet and I have never looked back since. I am running two computers through it and using a KVM switch..........it's great ! These days if anyone asks me to look at their computer which is experiencing some problem I ask them to bring it around, connect it up to the KVM, router attached through USB, and within a few minutes that computer is also running on my Broadband connection, very useful if you need to update drivers / flash BIOS etc
WORD OF WARNING ABOUT FREESERVE TECH HELPLINE.......if you have to call them about something they will not give you any advice/information/problem solving if you tell them that you are using a router, so don't tell them
Regards
FBW