Guide to posesix's custom line tool

Posesix's custom line tool can be confusing, so I wrote a little guide for it.

1. Downloading the Data
In order to edit data, you need data to edit. First, you want to open PCSX2, run PaRappa 2, and enter the stage you want to edit.
MAKE SURE IT IS PAUSED WHEN YOU DOWNLOAD/UPLOAD.
Next, start up the program. You should see a list of F# options; you want to press F9. The running instance of PCSX2 should automatically be detected and scanned.
If all goes well, you should see some garbage notes. Hit -> (the arrow key) twice to get to the actual lines. (0 is what the AI plays in Cool mode, and it can be edited without issue.)

2. Move It Along
Here's where things get a bit more tricky. As mentioned before, <- and -> are used to move between sets of lines. The /\ and \/ arrow keys move between various difficulty versions of the same line. To actually move left or right on the line, you need to use A and D respectively. Switching between the teacher's lines and PaRappa's is done by pressing W and S. Lines can be created or deleted by using SPACE and BACKSPACE. [ brings the closest line end (start or end) to the left of the cursor to it, while ] does the same to the right of the cursor. It is worth mentioning that there is a "precision window" for slightly offsetting the positions of notes, which can be navigated with Q and E.
So now that we know how to move along and create lines, how do we edit the notes?

3. Hit Those Notes
Pressing 1,2,3,4,5, or 6 will place a T, O, X, S, L, or R at the current location of the cursor. These notes CANNOT be moved directly, but can be copied and pasted with C and V. A note can be deleted by pressing 0. The actual data stored in the note is visible at the bottom left corner of the window, in hexidecimal format. This "parameter window" can also be edited. The parameter window cursor moves using IJKL, and the selected parameter can be incremented up or down by 1 with O and U, or by 100 when combined with the SHIFT key. An invisible note can be placed by pressing 7, and will appear as a ?. However, a C note cannot be placed, as it just indicates two or more notes along its precision window. (This goes without saying, but DO NOT EDIT THE ? NOTES BEFORE/AFTER EACH LESSON.)

4. Cut the Cut
By now, your stage data is probably bigger than the original filesize, which means that it cannot be re-uploaded. Fortunately, there is a way to cut filesize: linking variants. While on a variant other than 0, pressing ~ will link the current variant back to variant 0, cutting most of the data for that line. Enough variant linking should allow your file to be small enough without cutting corners.

5. Ascended
Your new stage data is now ready to be saved! And by "saved", I mean uploaded to PCSX2 and then made into a savestate. Press F5 while on the editor window to upload all of your stage data to PCSX2. You've just made a custom line edit! (You could also press ESC to switch between the editor and options menu, and inject your stage data into a .OLM by pressing F5 on the latter menu.)

[NOTE: Posesix has released an update to his tool. The most noticeable improvement is that files can now be loaded and saved with filenames. Other minor changes include the ability to edit Cool threshold data (press TAB and then ~), choose which variant to link another variant to, and to enter parameter values manually using ENTER. (These functions were in the program before, but could not be used.) Of note is that the updated version also detects original filesize more accurately.]

Guide by JustinJKJ, feel free to not give credit.