Here you can download development tools for Java™ ME including the LG SDK and skin packages. You can also download or view technical documentation for Java™ ME, Developer Guides, Development Tool Guides, and Technical Articles. LG-Arena info
http://developer.lgmobile.com/
Im not a programmer nor a developper but i believe this is usefull information for all of us. Perhaps with these documents and with more investigation we can understand how to modify the LG Arena. Now comes of course the most difficult task the understand there packaging technique,Hope a LG employee will do some homework. LG Cell phone Software
LG Arena phone photos – LG Cell phone pictures

It’s reported that LG Electronics is scheduled to launch an app store in South Korea on 14 of july. According to the new info, LG will not to expect any firmware upgrades. Now, I understand. We will have to purchase them. That’s o.k. In fact, I feel a sense of relief.
LG will start off supporting just two LG phones, the LG KS20 and upcoming LG GM730, which is also due for release in July. New LG KM900 Arena also coming soon, there will be an apps store for it as well. LG Cell phone news
LG GM730 phone photos – LG Cell phone pictures
To get your custom partition (Extract Custom Files), open the folder LGAPP\Media\Font with WinImage, you can see two files "LG_GothicSB_S_V1.03_0109.ttf" and "LG_Script_S_V1.00_0902.ttf". Move them to your desktop. KEEP WINIMAGE OPEN. The first is the font which is used now by your Cookie, the second is the font of the KS360. LG Phone Problem and solution
If you want the KS360’s font in your Cookie, rename the file "LG_Script_S_V1.00_0902.ttf" into "LG_GothicSB_S_V1.03_0109.ttf", and rename "LG_GothicSB_S_V1.03_0109.ttf" into "LG_Script_S_V1.00_0902.ttf". If you want a new font (Calibri), rename it into "LG_GothicSB_S_V1.03_0109.ttf". Put it into the folder LGAPP\Meda\Font through WinImage to replace the old one. Save and send it to your phone with KP500-Utils-En. LG-Cookie info