Creating new prestige classes and feats

[LordSerion]

Dear all,

 

I would like to know if it's possible to create new classes / prestige classes and if yes, how to do it?

 

My ideas would be Bounty hunter, Cipher agent, Elite trooper, Gunslinger and Vanguard - so no-Force user classes.

 

 

Also, is there a way to create new feats?

 

Thanks in advance!