How to convert BGAnimations for use in StepMania 4

I've always wanted to get songs with BGAnimations to work in SM4, they work fine in SM3.9 but in 4 they are centered in the top left of the screen instead of in the center of the screen...

Songs like Art of War, Zuppa Romana, etc with BGAnimations playing... What is the process to convert them so they center up because it seems no matter what I do they display in the top left of the screen mostly out of view.

Why not try stepmania5？stepmania4 has a lot of bugs,and it's not supported anymore now.

Few bugs in SM4. It does perfect ITG themes, Survival Mode, DDR Courses, StepMania Online, has a sweet fitness mode that was soon after dropped, and has full arcade functionality.

It's like the most features in any single version of StepMania. I just want to get my BG Animations working again, I miss some of them.

Few bugs in SM4. It does perfect ITG themes, Survival Mode, DDR Courses, StepMania Online, has a sweet fitness mode that was soon after dropped, and has full arcade functionality.

It's like the most features in any single version of StepMania. I just want to get my BG Animations working again, I miss some of them.
SM4 is riddled with bugs (one of the later betas outright destroys simfile timing data). SMO has its fair share of issues, fitness mode was never dropped (you can use it in latest SM5, it's just that no themes implement it), DDR courses are compatible with SM5, full arcade functionality is also present in SM5. The only thing lacking is that there aren't most ITG2-based themes, although there is an excellent ITG3 one.

It's also got the caveat of being totally unsupported, and lacks a gigantic amount of SM5 theme features.

(irrelevant side note: I'm working on that pad design, work is just kinda crazy for me)

EDIT: oh, right. upload anything you need BGAs converted for and link the build if it's not SM5, I'll port them and post instructions/tools for it.

Well I am clearly shown to be ignorant.

There's a thread I made about "STEPMANIA ARCADE" with download link. I was also wondering about the skin, if you want to get on it later I won't make the offer contingent upon having that just message me on FB and let me know what you want.