hahahaha, I remember when we were starting this out and said "ehh, screw it we'll just use 10###### and #### codes for 2 byte codes, 20###### ######## for 4 byte codes"
, it was easier since we were just using phaste. well, for gameshark, the code change is reeeeaaaaallllllyyyyy easy (tutorial?):
if the code you're looking for looks like:
starts with 00 and has 2 numbers that its modding (1 byte)
00###### ##
change to
20###### 000000##
starts with 10 and has 4 numbers that its modding (2 bytes)
10###### ####
then it changes to
20###### 0000####
starts with 20 and has 8 numbers (4 bytes)
20###### ########
then you're all set lol, no change required.