Try Multiplayer 3 JPCSPs on one PC

[gid15]

ok

Great!
It should also work when flash0/kd/utility.prx is present.

No yet

Well, you not just had flash0/kd/utility.prx present, but also many other PRXs that were used instead of the HLE implementations:

Code:

12:28:28  INFO   loader - idle0 - Found ModuleInfo at 0x08010FC0, name:'sceNet_Service', version: 0107, attr: 0x00001006, gp: 0x080198F0
12:28:28  INFO   loader - idle0 - Found 27 unresolved imports
12:28:28  INFO      hle - idle0 - NID sceNetGetDropRate[0xC80181A2] at address 0x0800E924 from module 'sceNetIfhandle' overwriting an HLE syscall
12:28:28  INFO      hle - idle0 - NID sceNetSetDropRate[0xFD8585E1] at address 0x0800E98C from module 'sceNetIfhandle' overwriting an HLE syscall
...
12:28:28  INFO   loader - CheckExitGame - Found ModuleInfo at 0x0A2F73BC, name:'sceNet_Library', version: 0103, attr: 0x00000006, gp: 0x0A300250
12:28:28  INFO   loader - CheckExitGame - Found 54 unresolved imports
12:28:28  INFO      hle - CheckExitGame - NID sceNetGetLocalEtherAddr[0x0BF0A3AE] at address 0x0A2EEFE0 from module 'sceNet' overwriting an HLE syscall
12:28:28  INFO      hle - CheckExitGame - NID sceNetTerm[0x281928A9] at address 0x0A2EF45C from module 'sceNet' overwriting an HLE syscall
...
12:28:29  INFO   loader - CheckExitGame - Found ModuleInfo at 0x08016010, name:'sceNetAdhocAuth_Service', version: 0103, attr: 0x00001006, gp: 0x0801E370
12:28:29  INFO   loader - CheckExitGame - Found 49 unresolved imports
12:28:29  INFO      hle - CheckExitGame - NID sceNetAdhocAuth_015A8A64[0x015A8A64] at address 0x0801379C from module 'sceNetAdhocAuth_lib' overwriting an HLE syscall
12:28:29  INFO      hle - CheckExitGame - NID sceNetAdhocAuth_1F9A90B8[0x1F9A90B8] at address 0x08012ACC from module 'sceNetAdhocAuth_lib' overwriting an HLE syscall
...
12:28:29  INFO   loader - CheckExitGame - Found ModuleInfo at 0x0A308680, name:'sceNetAdhoc_Library', version: 0104, attr: 0x00000006, gp: 0x0A310A00
12:28:29  INFO   loader - CheckExitGame - Found 42 unresolved imports
12:28:29  INFO      hle - CheckExitGame - NID sceNetAdhocGameModeDeleteReplica[0x0B2228E9] at address 0x0A3080A0 from module 'sceNetAdhoc' overwriting an HLE syscall
12:28:29  INFO      hle - CheckExitGame - NID sceNetAdhocPtpClose[0x157E6225] at address 0x0A3049DC from module 'sceNetAdhoc' overwriting an HLE syscall
...
12:28:29  INFO   loader - CheckExitGame - Found ModuleInfo at 0x0A30EB78, name:'sceNetAdhocctl_Library', version: 0106, attr: 0x00000006, gp: 0x0A3171C0
12:28:29  INFO   loader - CheckExitGame - Found 78 unresolved imports
12:28:29  INFO      hle - CheckExitGame - NID sceNetAdhocctlScan[0x08FFF7A0] at address 0x0A309508 from module 'sceNetAdhocctl' overwriting an HLE syscall
12:28:29  INFO      hle - CheckExitGame - NID sceNetAdhocctlConnect[0x0AD043ED] at address 0x0A309018 from module 'sceNetAdhocctl' overwriting an HLE syscall
...
12:28:29  INFO   loader - CheckExitGame - Found ModuleInfo at 0x0A3153B4, name:'sceNetAdhocMatching_Library', version: 0106, attr: 0x00000006, gp: 0x0A31D740
12:28:29  INFO   loader - CheckExitGame - Found 36 unresolved imports
12:28:29  INFO      hle - CheckExitGame - NID sceNetAdhocMatchingInit[0x2A2A1E07] at address 0x0A310C00 from module 'sceNetAdhocMatching' overwriting an HLE syscall
12:28:29  INFO      hle - CheckExitGame - NID sceNetAdhocMatchingStop[0x32B156B3] at address 0x0A310F04 from module 'sceNetAdhocMatching' overwriting an HLE syscall
...
12:28:29  INFO   loader - idle1 - Found ModuleInfo at 0x0A319820, name:'sceNetAdhocDownload_Library', version: 0104, attr: 0x00000006, gp: 0x0A321C60
12:28:29  INFO   loader - idle1 - Found 49 unresolved imports
12:28:29  INFO      hle - idle1 - NID sceNetAdhocDownload_0A531FBE[0x0A531FBE] at address 0x0A31821C from module 'sceNetAdhocDownload' overwriting an HLE syscall
12:28:29  INFO      hle - idle1 - NID sceNetAdhocDownloadTermServer[0x117CA01A] at address 0x0A3167C0 from module 'sceNetAdhocDownload' overwriting an HLE syscall
...
12:28:29  INFO   loader - CheckExitGame - Found ModuleInfo at 0x0A31ACCC, name:'sceNetAdhocDiscover_Library', version: 0102, attr: 0x00000006, gp: 0x0A322EA0
12:28:29  INFO   loader - CheckExitGame - Found 19 unresolved imports
12:28:29  INFO      hle - CheckExitGame - NID sceNetAdhocDiscoverUpdate[0x52DE1B97] at address 0x0A319F5C from module 'sceNetAdhocDiscover' overwriting an HLE syscall
12:28:29  INFO      hle - CheckExitGame - NID sceNetAdhocDiscoverInitStart[0x941B3877] at address 0x0A319E00 from module 'sceNetAdhocDiscover' overwriting an HLE syscall
...

The problem doesn't seem to be coming from the multiplayer implementation, but rather from the mix of original PSP prx files together with HLE implementation.