Day 1 EZFlash IV finally arrived, super excited. Do everything normally, update the firmware to the latest version removing that god awful Star Wars skin, replacing it with Clearlooks. Use the client to put all my favorite GBA games and potential new favorites into the 1GB micro SD card. All the games work amazingly, no slowdowns, no NOR problems, heck, Mother 3 worked with a small hitch (254 Mb write problem), but overall, super happy with my unit. Day 2 Problems arise, games just don't work when trying to play directly off the SD card via psram, super annoyed at this point. But the games run off the NOR perfectly, able to flash, delete, and write off it easily. Okay, that's alright, can still play my GBA games, no problemo. Day 3 (more like day 5 cause I haven't touched the thing in a while) Brother asks to play Castlevania: Circle of the Moon. I gleefully abliged. Try deleting existing game off NOR, won't work. Nothing worked, eventually, when try to play existing game off the NOR (Minish Cap), it would go to a corrupted screen instead 50% of the time (the other 50% it worked). At this point, I was super mad, I thought I was ripped off, 70 Canadian Dollarydoos I paid for this thing. Left dissapointed that my brother could not play Castlevania. Had a revelation, what if it was not the hardware that was at fault, but the software, what if that modified skin was doing something funny with my EZFlash... remembered that I put a game into the Star Wars EZFlash and it worked. Thought to myself, what if I replace the firmware with the official one from the Chinese site, AKA, the Star Wars one. I did it, and guess what, all my games worked, the psram worked, the NOR worked. I can finally start playing my games and my brother can play Castlevania. All was good again! TL;DR Use the original official unmodified firmware if you got any problems with you EZFlash IV, it's damn ugly and campy, but it works! Thanks for reading my journey, my brother is playing the GBA right now as I posted this. Will update if problems arise again (HOPEFULLY NOT DAMN IT!). EDIT: The only game not working so far is Super Mario Bros 3, but it could very well be a compatibility issue as it loads fine, but the graphics and sounds are corrupted. This issue is not related to my original problem however. Will replace the rom in the future if it will fix the problem. Fixed Super Mario Bros 3, just had to change the default save space from 1024kb to 128kb. Also, I forgot to mention, minesweeper only worked using the Star Wars original firmware. It never worked when I used the Clearlooks v5 skin. That really says something here. EDIT: Streetfighter 2 Revival only worked on NOR (awesome). Goldensun 1 froze at the big boulder part on psram, but it was able to get pass that part by running off NOR (great).