If you want to go freeware/shareware, you might consider taking a look at Crimson Editor. It has a customizable markup language (so it knows what to highlight, keywords, etc...). It has a LOT of built-in languages it can understand, among which T-SQL and PowerShell (although PowerShell is a "custom" template you need to add as I recall).
It's not intellisense, but not bad for a basic markup, type and validate basic syntax kind of app.
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Your lack of planning does not constitute an emergency on my part...unless you're my manager...or a director and above...or a really loud-spoken end-user..All right - what was my emergency again?