From 1X to 2X Portraits

[kgbaseball]

Since the quality is obviously better with 2x, I want to try and make every portrait of mine 2x. The only problem is I dont know how to make .fsh files that are 1x into 2x. Ive tried, for example, exporting 00xx.fsh (2x), renaming it to a 1x file, and then reimporting it into the 1x file, but that only gets me blacked out portraits or game crashes. Ive read some threads and putzed around with the index.fsh after using nfsh with the 2x .fsh, but still only black portraits and crashes. :shrug:

So heres what I need: an explanation on how to turn .fshs that are 1x into .fsh that are 2x

I know that first paragraph was kinda hard to understand, but hopefully someone understood it. Any help would be terrific. Thanks.