Hi TchnclFl,
I made the following wiring and used three wire connection of lib. But I was not able to make two wire connection with 74HC595 :(.
arduino pin Shiftregpin LCDpin
datapin -> 14 (ds)
clockpin-> 11 (shcp)
enablepin-> 12 (stcp) -> 6 (E) pin
3 (Q3) -> 4 (rs) pin
4 (Q4) -> 11 (D4) pin
5 (Q5) -> 12 (D5) pin
6 (Q6) -> 13 (D6) pin
7 (Q7) -> 14 (D7) pin