Finally I have time to install and use JSGME.CSABadass said:You might want to check out the JSGME mod enabler program as another option to what's already been mentioned.
Now I have only one installation of Doomsday and easily can turn it into DD1.2, DD1.3a, Armageddon 1.0, Arm. 1.1, Arm. 1.2 and to enable/disable CDCP, my or any other mod. Works just perfect!
Thank you again!