Virtex-4 FPGA with Jbits3.0?

I would like to acquire the Virtex-4, however, I woul like to know which the tool that could make partial and dynami reconfigurable with such FPGA. Did I use JBits for Virtex, however he was not very good, does exist other tool for the Virtex-4 for partial and dynamic reconfigurabl this system? Which tool do me use for the Virtex-4 to do the partial and dynami reconfigurable? :roll: Thankfu Joelmi