Nice implementation by 'komang'! You click on "Register" in the 'horizontal' and is guided straight to the CB register module. Good work.
I only hope you both been reading all the requirements for CB thoroughly. I've been trying to package the Magnum Opus template, VM (VirtueMart) and CB toghter on the same site, for some time. The hickup is that whilst VM needs additional info about the presumptive buyer, CB has their way to register users. (No blame on the template.)
Actually the first step to take when implementing CB is to totally rip out the original Joomla login module and replace it with CB, second you need to coordinate already existing users in Joomla with the newly installed tables inserted by CB. Third you cancel all standard Joomla User management from backend and only use CB.
CB has many advantages in creating a grand community, but to my opinon they've done very little to consider coexistence with other part of the CMS project. I mean if you already have database tables working with user handling, why create the wheel all over and replace it with your own proprietary solution? Why not build on that?
Of course you can twist your site around to run CB in conjunction with whatever you want to throw into the mix.
But to me it seems that the CB idea, is that it wants to run alone and thereby setting up a very good looking social network. he CB user society tries to help out though, making their own fixes and bridges. There is for example a bridge to VM. But it's only for Joomla 1.0 and made by a single user.
For small to medium sites (private or corporate), personally I would recommend using Fireboard instead. It is installed as a normal extension into Joomla. It utilises all Joomla functions and it plays "nicely" with all the other little kiddie modules you throw into Joomla 1.5. (Including VM). And it's fairly simple when it comes to tweaking layout, colour and so forth.