Well, pretty much every game that required the use of a RAM cartridge were released both in a bundle with the cartridge, and a regular CD-only version. It would be really cool with a UGC or similar box to house both the disc, manual and cartridge, but ultimately I really don't think it matters much. If inaccurate information on the box bothers you too much, I'd recommend making a "clean" version for the DVD case, and a "RAM Cartridge included" version for the UGC case - provided it'd even be possible to house both the cart and disc in the same box.
The original games came in cardboard boxes that housed the game in a regular CD case as well as the RAM cartridge. The front of the cardboard box would generally have some sort of "RAM Cartridge included" notice on them, while the game inside had the same manual as the standalone version, and as such no mention of the included cartridge on the front of the actual game case. The bundle version of the games however came in clear jewel cases with no back inlay, whereas the standalone version (obviously) came in standard Saturn jewel cases.
In that vein I feel it is a little weird to have the cover say that the cartridge is included when it is not actually in the DVD case, but no matter how you go about it, it's not exactly the end of the world....
