In Linux I could press Tab+Shift and my ship would run in turbo without me holding the Tab Key. Now I am running Windows XP for a while and I don't know how to do this in windows.

Hold tab then at the same time hit the windows key, it mininmizes you to the desktop but as soon as you unminimize vo again your shit will keep boosting till you hit tab again, or you could just make a toggle turbo bind.

/+turbo will make you turbo, /+turbo 0 - stops you turboing

Or use a better turbo lock, like the one here:
http://www.vo-wiki.com/wiki/Turbo_lock_bind