Actually it does exactly what the tooltip says it does.
Allow me to translate.

Originally Posted by
Tirn
Briefly undetectable in stealth Stealth not broken by damage Duration:10s
You cannot be spotted, by walking past someone, Stealth is not broken by Damage from effects that were applied to you before you HIPS'ed.

Originally Posted by
Tirn
Sets runspeed to 100% Duration:10S
It seems to work fine from what I have seen, sets your runspeed to 100%, just like the tooltip says it does.

Originally Posted by
Tirn
Removes all Disease, wound,fear, poison effects with Maximum strength of 100 from the target ."
This refers to potable effects(Wound, Disease, Fear, Poison), just as it states. BA trap is in fact not labeled as a wound, which means you cannot pot it, in fact it is not curable.
As for HIPS not working after CDG, I wouldn't know. Perhaps that is because CDG makes you enter stealth as well, and having the two versions of stealth active at the same time breaks stealth completely?
I do not have a burglar of my own, so the last part about CDG is just guessing...
High Chieftain Zlaughter
Commander Tarturin
Original Challenger of Saruman | Original Challenger of Gothmog