If they are iPad only, you can't.
Wrong.
Rtfm.
Wrong. I just found all my purchased apps in the app store and i can download any into my touch5.. Rtfm.
Wrong, I jut tried putting an iPad only app on my iPod and it failed because you are wrong.
Well i did it and it worked UNLESS the apps i had on my ipad are compatible with the touch which is probably the case. In any case any or all if what i had on my ipad works perfectly on my touch5.
There's no option to download my ipad apps in the app store to my new ipod touch 5. I thought purchases were across the board.