As stated before you will have to downgrade the ps3. However the flasher that you need all depends on the model of ps3 that you have.
If you have cecha01 to cechg then you you will need progskeet cause you have a nand ps3, this will have to you solder to the nand chip on cecha or if you have another model that doesn't have motherboard cok-001 then there are alternate solder points on these boards.
However the motherboard cok-002 still has three wires that need to be soldered on each nand chip. The rest of the motherboards for nand chips have these points. The E3 WILL NOT WORK WITH NAND PS3s. Also they make clips for progskeet.
Now if you have cechh and up you can use a e3, progskeet or a teensy. These are soldered the the jtag points on the motherboard. Also make clips for the NOR PS3s. Thanks