There are hair conversion utilities you can get that will transfer one hair model to another figure. 

Also, PhilC recently stated in another thread that Wardrobe Wizard will convert hair as well.

It will help if you let us know which hair model (and for what figure) you are trying to get to work on which other figure. 

ETA: If you have Poser Pro 2014, you can also try using the fitting room. 

And, Netherworks Hair Conversion Utility is free at RDNA. Add-ons for various figures are an additional cost. 

Aside from all that, pretty much what you're doing now is about the only other option.