Can you use 2 firmwares on one card?

I have a DSTWO and an Acekard2i, and I really want to play Portrait of Ruin, but it doesn't work on my DSTWO, keeps freezing. A few games run kinda slow on the DSTWO as well. I'm wondering if I can put the acekard firmware on my microSD AS WELL as the DSTWO firmware so that I can move my microSD between my Acekard and my DSTWO at any time.
Can I do this without any repercussions?

Whats the Menu.dat file you have? _ds_menu.dat?
If both are diffrent then it can!

I can't even find the dstwo menu file. But the acekards is akmenu4.dat, so the file names will obviously not be the same. I'm kinda nervous to try it.

Replying to #3

you can also decrypt one to an .nds file to load it?
and if i;m correct the DSTWO only has an _dstwo folder,
just copy that to an card with you acekard System menus and done!

I have no idea what you just said. You make it sound like I have more than 1 microSD card.

Replying to #5

i mean just take yout Acekard Folder + system files and the Supercard DSTWO folder and place em in the root of your card, then you can use them both if i'm correct!