OK, I have got a dump of all the files in my friend's 2GB memory stick...He has got Syphon Filter - Dark Mirror in it, but its not in ISO format...instead, its in a directory format, and its files are put in the main root of the memory stick (in 'SYPHONFI' folder)...it is loaded through an EBOOT file located in a syphon filter folder in the PSP\GAME directory.....Now I want to make an ISO file out of all this, and I dont know how to do it....I tried making an ISO out of all the files in the 'SYPHONFI' folder using UMDGen 3.50, but when i tried loading the ISO, the PSP just said unable to read disc !!....

So how do I successfully transform this directory type game, into an ISO type game ??

Also, I have posted a filelist of all the files in the memory stick dump if you need it...here's the link to the file:

http://www.geocities.com/ahmad.najeeb/syphon.zip


Please help....thanx in advance

so is there a solution to this problem ?

You had the right idea in using UMDGen to rebuild the ISO.
However, the directory structure you used is not quite correct; in the root of the ISO you need a folder called "PSP_GAME" in which you can put everything from the "SYPHONFI" folder. You also need a "UMD_DATA.BIN" file in the root of the ISO. I've attached the filelist from my working ISO of Syphon Filter to help you.

Out of interest, which ISO loader is your friend using?