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.

 

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.

 

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!