Is it possible to implement a JTAG connection in verilog/vhdl to the expansion pins on the breakout board for the XEM3010. I saw that JTAG connections already existed on JP1; however, I wanted to send data from the FPGA to another device, using a JTAG connection.

It’s not clear what you want to do exactly, but you may want to look into the BSCAN_SPARTAN3 primitive.