Oh the only thing, that ISO folder is of course for PSP games/Minis so anything with CSO or ISO but if you have any PSP emulation you want to put on this you'll need to drop those files into the GAME folder for them to work, I'm happily mashing through stages in Rhythm Tengoku on the GBA using GPSPkai inside the EPSP, so much joy having full speed GBA on the Vita even if it isn't Native and of course we have access to the PSP's N64 emulation now, which isn't perfect but it's enough to play through Mario64 as long as you have the audio disabled (have 120 stars on my PSPgo save heh)
Should completing installation of taiHEN cause the browser to crash?
Oh that can happen alright, you can know if it's installed by either firing up a thing which wouldn't boot on the official firmware or else go into settings in your Vita and checking inside Settings > System > System information, with this installed and working your System Software should read 3.60 "2 chinese symbols"-7"beta symbol"4, the main thing is just not to freak out if you have this installed and you go to run Henkaku because you will get the error message that your system is on 3.61 and is no longer Henkaku compatible, but it's perfectly fine, do not freak out thinking you were tricked into updating (I sure didn't do that!... in full panic mode)
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can we run psp.iso on this?
If you mean can you run PSP games now on the Vita? Yup that is exactly what this is for, you basically get a PSP hidden inside the icon of whichever PSP game you offer up to your lord and saviour TheFlow, that psp is on a custom firmware version 6.61 which after creation can be used to play any psp software or any emulation programs which were designed for the psp.
It literally makes the device a 2 for 1 with the lovely OLED screen goodness.
http://i.imgur.com/t93i1Jx.jpg
only thing is, read through the instructions carefully as you install this, there is a lot of steps and it works fine as long as they're all followed!