sorry for the necro-posting, but i have somewhat of a similar problem. i was in the same boat, not being able to find .cht files for use in FCEu. so, i found a shitload of cheats for nesticle and wrote a little converter for them.
my trouble is, there are different types of cheats. there is the "address & value" cheats which simply slaps a new value at that address. i was able to convert these without issue. then i come to the gamegenie type codes. using the converters that can be found online lots of places, i can convert a gamegenie code to "address, value, compare" format.
the code "SZVKUUVK" becomes addr=4B6B, val=AD, comp=CE. and my converted code now looks like
SC4b6b:ad:ce:description of the code
i have verified that when i use the game genie rom and type in the actual code, it works. but for some reason, the converted gamegenie codes dont work. is there some syntax i am messing up? or does anybody know what i am messing up here or why these codes dont work?