What openings do you use this in? This works fine in a very closed French, but in other openings its very dangerous, and depends on your opponent being totally unable to create counterplay.
tactics that deal with castling?

Generally it's because pawn storms are a high risk venture. You spend several moves where you develop no pieces, and hope your opponent can't generate counterplay. If he can, you usually end up with an open center, underdeveloped pieces, and if you castled on the same side an exposed king (because you just moved your pawn shield). Of course generating this counterplay takes experience and nerves.
To summerize, it's because opening the center usually takes a lot less time then pawn storms, so a skilled opponent can force you to shift your attention to the center before the pawn storm finishes (which is really, really bad)

Generally it's because pawn storms are a high risk venture. You spend several moves where you develop no pieces, and hope your opponent can't generate counterplay. If he can, you usually end up with an open center, underdeveloped pieces, and if you castled on the same side an exposed king (because you just moved your pawn shield). Of course generating this counterplay takes experience and nerves.
To summerize, it's because opening the center usually takes a lot less time then pawn storms, so a skilled opponent can force you to shift your attention to the center before the pawn storm finishes (which is really, really bad)
+1 great reply
It's mostly in games where my occupation of the center isn't being challenged directly and with already developed minor pieces..off course i'm not going to castle on the same side..if there's a pawn on the g3 square it simply takes 2 moves to challenge the enemy's pawn structure protecting the king and most likely to open up the rook file..which can be devastating

I'm not saying pawn storms are never a good idea, just look at the dragon, the pirc 180 attack, the keres attack, the carokann exchange, there are a TON of openings where pawn storms are a thematic idea. Have I seen h4-h5 been used successfully? I've seen it used so successfully by bobby fischer he put the sicilian dragon out of commission for a few years. I'm not saying a pawn storm is always a bad idea, I'm just saying a lot of the time it backfires perticularly if your opponent opens up/can open up the center. White plays d5 in the KID - great! It's time for a pawn storm. White plays dxe5 in the KID - no pawn storm for you.
I kind of wonder why i haven't really seen any at games at professional level that don't involve castling..
After the enemy castles,I just usually advance with the pawns freeing up the rook's file and messing up the enemy's pawn formation, after which the queen is being placed in front of the rook ready to storm the front,which often turns out pretty good at amateur level..off course it involves knights and the bishops and all that stuff in supporting roles all,but i'm just trying to show the basic concept
Why aren't these tactics employed more often at higher levels?