Well, here's some tips...

HKLM = HKEY_LOCAL_MACHINE
HKCU = HKEY_CURRENT_USER
HKCR = HKEY_CLASSES_ROOT
HKCC = HKEY_CURRENT_CONFIG
HKU = HKEY_USERS

Regarding the "_", ala VBScript. No need. KiX is a free-format scripting language. Just break your line and continue on the next. If you're using quotes, put an end-quote at the end of the line and following with a "+" then continue your quote on the next line...

code:
"This is a long line....................."+
"........................................"+
"....and I'm spent." ?