Just as a final reference for all: CM installer is not for the I337.

On MF3 and above, we have no exploit for ROMs and Cyanogenmod is not compatible with our stock kernel.

Even on MDB/MDL it won't work because you need Loki which the installer doesn't take care of AFAIK (if it were to even let you open it).

Sent from my SGH-I337 running GPE
Current Device: ATT Samsung Galaxy S4 (i337)

Past Devices:
Droid Bionic (GSM Hacked)
HTC Inspire 4G (Desire HD)
Nexus One
Motorola Backflip
HTC Dev Phone 1 (Dream/G1)