For those who have trouble to play this game, here’s what I did:

1. Google and download “PS3 ISO TOOLS V2.2” or a later version. Unzip the file to a PC location where you can find later.
2. Google and download “multiMAN v04.85.01.pkg” or a later version. Install it on your jailbroken PS3.
3. Download the game from this website (two zip files).
4. Unzip the downloaded files, and you will get a folder “Dai-3-Ji Super Robot Taisen Z Rengoku-hen [NPJB00689]”.
5. In the folder you will find two subfolders: “PSN Ver” and “Retail Ver”.
6. Ignore the “PSN Ver” because it doesn’t have the license file.
7. Use the “PS3 ISO TOOLS V2.2” downloaded under STEP 1, and run the execution file.
8. Select the correct FW version, and then “Create ISO(s)”, leave everything as default on the second page if you don’t understand what you are doing.
9. Then click “Continue”. You will be asked to provide the source folder first, choose “NPJB00689” folder under “Retail Ver” from STEP 5.
10. After selected the source folder “NPJB00689” you will be asked to provide the destination folder. Select where you want the ISO file to be stored, and then click “OK”.
11. After the ISO process is completed, you will have two .txt file pop-up for the summary. Close all.
12. Find the ISO file you just created, and copy it.
13. Go to your USB flash drive (not a external hard drive) which has FAT32 formatted. Create a folder called “PS3ISO”, and paste the copied ISO file in the “PS3ISO” folder you just created.
14. Disconnect you flash drive and connect to your PS3. Do whatever you do for the jailbreak of your PS3.
15. Open the “multiMAN” you installed under STEP 2. Go to “mmCM” Homepage, and open “File Manager/mmOS”.
16. Under “File Mangaer/mmOS”, select “PS3 Root”, and double click “X”.
17. Under the directory, find “dev_usb00x” (“x” stands for the USB port you use on the PS3, mine is “dev_usb002”
18. Double click “X” on the “dev_usb00x”, and it will open the USB flash drive directory you connected to the PS3.
19. Find the “PS3ISO” folder under your USB flash drive, double click “X”, and open the “PS3ISO” folder, select and copy the ISO file you placed in that flash drive folder.
20. Open “PS3 Root” again, and find “dev_hdd0”, and double click “X”.
21. Under the “dev_hdd0”, you will find a disc icon called “PS3ISO”, double click “X” to open the “PS3ISO” folder, and click “O” to paste the ISO file you just copied to here.
22. Exit “multiMAN” and get back to your XMB.
23. Go to “webMAN Games”, assume you have “webMAN” installed on your jailbroken PS3, if not, Google and download the latest “webMAN MOD v1.47.31.pkg”, and install it on your PS3.
24. Under “webMAN Games” you will find “PLAYSTATION 3”, and show “1 PS3 format games”. Bingo! Now the game ISO is recognized and you can click it to load it, and it will run flawlessly.
25. If the folder is empty, go to “webMAN Setup”, find “Refresh My Games & XMB”. This will reboot your PS3. Once the PS3 is rebooted, Re-HEN if you don’t have a permanent jailbroken system, and go to the “webMAN Games”, and you will find your ISO file under “PLAYSTATION 3” folder now.