zakpeegoodus,
I converted my licence in 03(Aussie CPL with ME CIR), took a few months, but could have been done in shorter time. Basically the hours of flying count but you need to do all written tests and flying tests for appropriate licence. Also, lots of FSDO staff have "slightly" different interpretations of regs and it took a while to make sure I had right flying time etc.
Things I had to do extra...
Must have 10 Take offs and landings Full stop and go, at night at controlled Airport with tower for Inst rating. Aust didnt have that requirement.
Also, none of my SIC time counted as it wasnt under US 121 or 135 regs so I couldnt use it in my total time...like I said, it came down to what FSDO interpreted.
Are you wanting ATP or just CPL with IR?
Hope this helps.