OPEN LINEAGE2 FROM THE DESKTOP

hi all,

my questions are the next:

can i open innova lineage 2 client from the desktop or just from mozilla or chrome or from other web browser?

in the way i just can open it from web browser, my mouse have x5 buttons, is an a4-tech, but the program normally i use for l2 for use the 4th and 5th button need an .exe file for work, so when i try config from web the 4th and 5th button dont work ingame, so the question is:

u know any way for i can use my 4th and 5th button in this server?

ty, regards.