Welcome to PS3ISO.
CFW can only be installed if your on 3.55OFW or below.
It seems like you received a new PS3 for christmas.
It is safe to say that your model is not downgradeable.
If it was pre-owned you can check whether it is downgradeable via hardware flasher, check the model & date code & compare it to info on
Everything you need to know is in the tutorials section.Code:http://www.ps3devwiki.com/wiki/SKU_Models