In today’s world you can get different different scripts for different applications but its really hard to find a place which sell a version which is comprihancive and can act as any other website like yahoo or any other.
The major problem here is that login formatis differen and user sysnc is quite not possible between two scripts.
jfusion has arrived as its solution. One can see its functions and fetures at www.jfusion.org
We can design any jfusion plug in if you want. Do contact for that.