DreamShell 4.0 Beta 4

[SWAT]

Unfortunately no. I debugged it on the emulator using the cd loader (load images from the CD), and only final tests on DC (without debug).
Some games that do not run, do so because the loader overwritten in memory.
Once the game that wants to rewrite the loader memory location, the loader (3.0.1) stops this process and starts to load DS core. Maybe at this point can to cancel memory rewrite, but i don't know how to.
Basically at this point would be to save memory (and reg state) on the SD, but the loader does not support writing, because memory is not enough.
I think that you can track it on an emulator with cd loader (probably better on lxdream).