No hood dryer, then you can buy, relatively cheaply a type of hood, which is soft and goes over the head. It has a tube attached, which you insert the nozzle of a regular hand held dryer and the hood part will inflate with the air and heat from the dryer, heating the hair too.
If thats not an option, then just wrap the hair with treatment on in clingfilm and hold a hair dryer a few inches from the head, kepping it moving, so the heat is distributed evenly. Do this for 10 minutes or so.