Description :
This is a modified version of SpellAlert that instead of putting the notification up in it's own frame will send a message to ScrollingCombatText.
There are several command line options to set how the text is displayed.

/sasct menu -- Opens the options frame. (needs SpellAlert SCT Options)
/sasct test -- Send a test message to see how it looks. (Also done automatically after a settings change)
/sasct toggle [on/off] -- Toggles alerting of spell casting on and off. [Default is On]
/sasct color [default/target/warn/emote] [red/green/blue] [0.0 - 1.0] -- Sets the color component of the specified color.
/sasct repeat [number] -- How long in seconds to refrain from repeating the same message [Default is 2]
/sasct ignore [on/off] -- Toggles using the ignore list on and off. [Default is On]
/sasct iadd spell -- Adds an item to the ignore list
/sasct irem spell -- Removes an item from the ignore list
/sasct ilist -- Lists all spells on the ignore list
/sasct targetonly [on/off] -- Toggles alerting for spells of your current target only [Default is Off]
/sasct force [on/off] -- Toggles using the whitelist on and off. *new* - thanks to jvanber for the idea.
(Overrides the Target Only setting forcing whitelisted spells to alert.
The default whitelist contains mana burn, drain mana and viper sting)
/sasct fadd spell -- Adds a spell to the whitelist *new*
/sasct frem spell -- Removes a spell from the whitelist *new*
/sasct flist -- Lists all spells on the whitelist *new*
/sasct colorize [on/off] -- Toggles colorizing the messages on and off. (overrides color choices) [Default is On]

Credits:
BarryJ (SpellAlert SCT upto v20000-1)
Elsia and contributors on this wowace thread.
Ammo (bit mask on loan from WitchHunt)

Changes:
clicky