How to change a Subaru Head Gasket without removing the engine

These are the sets I like to use on these EJ25 engines.
http://www.amazon.com/gp/product/B000...

1:07 Identifying engine type
1:25 Inspection showing oil leak from head gasket
3:12 Remove air intake (discussed)
3:35 Remove battery (discussed)
4:00 Remove air compressor (discussed)
4:10 With above removed and belt covers removed
4:20 Remove belts
5:49 Remove A/C compressor tensioner bracket
7:00 Remove alternator
8:50 Remove air compressor (discussed)
8:56 Drain radiator
10:10 Remove power brake booster vacuum line, fuel lines
11:48 Disconnect spark plug wires/brackets
13:42 Remove A/C compressor
14:15 Remove spark plugs/bracket
15:02 Disconnect oil sending unit wire, coolant temp sending unit, crack shaft position sensor wire
15:50 Remove radiator

How to change a Subaru Head Gasket without removing the engine