HiYou won't need to launch the Acekard 2i.
You can directly access it's microSD contents from TWLMenu++ on the SD card.
To do that, enable Slot-1 microSD access in TWLMenu++ settings.
With that enabled, you can use the Acekard2i as secondary storage.
You can enable the TWL enhancements (TWL speed, boosted VRAM) for the games on there, and launch DSiWare from there as well.
There's some disadvantages though. While SDK5 games and most SDK1-4 games work, some SDK1-4 games won't work, and the saves need to be on the SD card.
Thank you for your response. I now I have two questions. I enabled that feature, but how do I access it as a secondary storage device? I am using the Acekard Theme and I can't seem to find it anywhere. I have tried other themes as well and no luck (DSi Theme gives me a white screen). If it requires to launch the cartridge to do so, it gives me a white screen still. My other question is, is it possible to launch the Acekard 2i at all on Twilight Menu++?