MurtenTK said:
Yes, it's possible.
You can find how in the stickied topic "R4YSauto" of the R4 DS forum.
Actually, it's not that simple. The R4YSauto instructions assume a real R4 or a close clone. The cards from R4i-SDHC.com are actually DSTT clones.
That said... it looks like it one can get YSmenu to work on an R4i-SDHC, but not necessarily in an easy-to-use fashion.
As an experiment, I copied over the TTMENU and YSMENU directories as well as the TTMENU.nds and YSMENU.nds files from the SD card I use in my DSTT. If I launch YSMenu from the R4 menu, it runs, but I can't launch any ROMS as YSMenu pops up an error dialog which reads "Unsupported DLDI name".
I'm speculating here, but I would guess that YSMenu uses the DLDI name to determine the type of card it is running on. (The R4i-SDHC cards report something like "DeMon IO Library" as the name of the DLDI driver.)
Interestingly, I can run TTMENU.nds from the R4 menu. This works and will even let me launch commercial ROMS. Also, if I launch YSmenu from TTMENU, then I can launch ROMS (including commercial ones) without the "Unsupported DLDI name" error.
To summarize... YSMenu will currently run, but you have to launch it from TTMENU which has to be launched from the R4i-SDHC menu. At a minimum, I suspect we would either need an upate from Yasu to recognize the R4i-SDHC DLDI driver or to hack the R4i loader to replace its DLDI driver with the TTDS one.
For those who are wondering, I have tried replacing R4.dat with a copy of TTMENU.dat. This does not work as the card just gives an icon reading "Menu?" at boot.