You cannot run GTA:LC or Socom on 1.5 right now NO MATTER WHAT. Certain 2.00 games can be run using fastloader and/or others but not these.

The reason is because when they made that particular game they used a encyrption that 1.5 firmware doesnt have the tools to deal with. Only 2.00 and up has it.

What I do is simply use 2.00 to play my GTA UMD and load my homebrew/rom Emulators with Fanjita's 0.85 loader. The only thing 1.50 has that 2.00 doesn't right now is access to kernel mode and homebrews can't access the USB, WiFi, UMD parts. When I get bored of it I just downgrade back to 1.5 then play some ISOs.

Out of all the new games requiring 2.00 firmware only GTA and Socom are the ONLY ones I know of where u need 2.00 to run. If they do manage to crack 2.00 to where it can access all the stuff 1.5 can then in the future if they release games requiring 2.5/2.6 this won't mean a thing cause no kind of extra encyrption was added to em! But of course after 2.00 games are fully cracked or they make a real 2.5 downgrader then they'll come out with their next version of firmware 2 cover their asses