Program running from launcher directory

Ok, today I have yet another question, although I am finally learning! I have successfully made an application portable using Chris's Launcher, ePSXe, a very nice PSX emulator, now, it is almost portable. The problem I am having is this: ePSXe loads all it's plugins based off the directory from where it is running
ePSXePortable---launcher
|
|--app
|
|--ePSXe-
|
|-bios
|-plugins
|-memcards (list continues)

Now the problem is, when ePSXe is running from its own directory, the main exe, it locates the plugins, etc.
when it is running from the launcher, I must place these folders in the launcher directory, anyone have any clues as to how to fix this?, or allow it to use the data directory or something? thanks, and if I figure this out, or maybe even if I don't I'll be able to compile my own NSIS launcher. (I was able to find some help on those, thanks to those two from my other topic. Perhaps for aspiring beginners I could write a beginners guide to NSIS launching by beginners.