look for LSPprovider.dll in l2ph distr.
upd:
changes from 3.5.18.132 to 3.5.22.139
readX/readXex functions in plugins was fixed.
lsp module from now can work in "inject.dll"-like mode. (intercept whole connection)
readq/writeq functions, int64 type added to script engine
and readq,readqex,writeq,writeqex functions to plugins.