There are somethings that you will also need. There are clips that hold the bows in these can be had for around $35.. Without these you are sunk.. There is also usually a small wire that holds the first bow in at the rear you will need this or the bows will always want to pull forward as you go.. There are also some u-clips that hold the headliner on the roofrail these are a bit pricey but can be had for somewhere around $10. You will also need headliner insulation this stuff is really cheap and some contact cement I usually use 3M extra strength. The contact cement is for around the very outer edge of the headliner and also to hold the insulation in. You will also need a heat gun (this is for the wrinkles you will have them..) Just make sure you keep the gun moving and don't get to close to the headliner it will melt.. I have done 3 or 4 head liners and they are a bit of a challenge but do able.
Heck not that long ago I did one on a Superbee with a roll-cage in it and it came out great. Just take your time and work back to front with the bows and then work your way across the front and rear at the same time. Helps if you have 2 people but can be done with one.
http://www.moparmusclemagazine.com/howto/mopp_0608_mopar_car_headliner_replacement/viewall.html
This is an article in Mopar muscle that should help..
Good luck when they are done the look great.