I see that you're new here.
Well first you must tell us what phone model you have and your current firmware.
I supose it's an E398 with R372 firmware because that one doesn't support java on memory card.
If it's how i said you must upgrade your phone to R373 firmware and there are 2 ways:
0. It don't matter what way you choose: You MUST make a full backup of your phone with Flash Backup (
http://www.esnips.com/doc/d4474202-9ade-45a7-ba36-2ff9e24d182b/FlashBackup-2.62)
1. The first method: You flash the "R373 42R for all" to make the conversion to R373 and after that you flash any other MP (Monster Pack) that you like from the Monster Pack section of this forum or from the
http://www.e398mod.com site. The only disadvantage is that your bluetooth adress will reset (but don't worry it can easy be repaired by simply restoring the PDS Backup created with Flash Backup)
The full tutorial for doing this is at:
http://mirror.softcox.com/e398-to-ROKR/.
2. The second method is to flash only the CG7 from 42R for all firmware (
http://www.e398mod.com/content/view/65/30/) so your bluetooth adress won't change. And after flashing this, the phone won't start in normal mode. You will have to flash any Monster Pack that you like as i said at (1.).
If you don't want to use Flash Backup for flashing you can use RSDLite
NO WAREZ LINKAnd if you want to see the java games before installing them onto your phone you can use this app:
(
http://www.esnips.com/doc/5ff4cb5b-21ef-40c8-9933-6002107d324e/MidpX_1.31)
MOD EDIT :1. Remove Warez Link