If I upgrade from halo 3 to halo 3+, will I need an expert or can I just plug everything in myself?

[FelixCore]

I'm about to get halo 3+ since it's only £1 extra, but I won't if it makes my internet go out for any reason or I need an expert to install the new stuff, if I can do everything myself without a hassle and still have my internet i'll buy it but I need to know.

Upgrading from BT Halo 3 (basic) to BT Halo 3+ 

[pippincp]

There nothing for an engineer to do. Any additional equipment is self install.