IIRC before 1.2.4 the software was locked to the original engine type requested when originally ordered. Most people got their DHP's second or third hand by now. I am the original owner of mine. when i bought mine they just started offering 2 engine types that the tuner would work on. If you were to use 1.1.9 I know that you will not have full access to all different engine types as far as saving and flashing. Version 1.2.2 introduced the ability to perform partial writes and will allow real time writing of scan data. as said before, 1.2.4 unlocked all the engine types. also with each data base update more support was added. there is also a database update that was never included with the above versions. it allowed me access to TCC and gear ratio settings on my DOHC engine. I am not sure what else it can do but was very handy.
