i am having an issue dual boxing as well, on the same laptop. I get the first launcher running then I go to the Exe file and when i open it an error message comes up.
< verify > E:/live/eq2/game/client/src/clientapp.cpp (3961):
No game assets found. Please launch teh game from the patcher.
00417f9d 00fd8128
I am currently streaming the game but i have been able to dual box on the same laptop before, i dont know why it isnt working now.