Quick and Dirty Video Tutorial:
Attached here is an mp4 video from start to finish summarizing the method and applications I choose to use.
They work for me assuming my code adheres to certain rules.
First, I use Classic99. Harry Wilhelm's compiler comes with it along with a guide. in your class99 folder you'll see the contributor's folder.
look in there for the docs.pdf and read them from start to finish. It's a full guide on how to get your AE5 file from your BASIC file as well as the rules you need to follow.
From there I take my compiled program in to TI99Dir and convert it to a V9T9 file.
Then I go in to Module creator to convert it in to a non inverted rom.
Then I copy the produced bin file to my flashrom99 sd card, plug it in to a ti-99/4a and choose my file from the list.
And it works, usually.
This mp4 video>> xb2fr99.zip 45.17MB 55 downloads<< shows you the entire process from start to finish in 12 minutes and 20 seconds.