''...\launch.exe''.
Put the word wizardmaster one space behind that line so that it looks like
''...\launch.exe'' wizardmaster.
This will enable a hidden cheat menu in the inventory screen. You have the following options there:
Godmode: Do you really need an epxlanation? Inf. health.
Medikits: Inf. medikits, although only your actual amount is shown (kinda using an invisible one).
WRInf: Weapon Reload inf. Same as with the medikits. Works even if you don't have ammo for that weapon.
Debug Info: ?
BTW, if you replace launch.exe in your link with alone4.exe, the game will start immediately without the (annoying) start menu.