Don't worry. Using Alkaline batteries will be fine.
Kodak, like other manufacturers, try to push their own brands. But the fact of the matter is that you won't be able to take many photos on a set of alkaline batteries. They lose power quickly and, if you take a lot of photos, it can be very costly. Manufacturer and digital camera users recommend NiMH rechargeable batteries for good reason, which you can read about here:
http://www.digicamhelp.com/digital-camera-batteries/digital-camera-batteries.htmIf your camera accepts them (not all do so check the camera manual), another alternative is Lithium batteries. They are very lightweight and have seven times the capacity of standard alkalines and a long shelf life. But, at this time, they are also quite expensive.
I have two sets of rechargeable batteries but if I know there is a possibility they won't last when I'm on a photo shoot, I take along a few sets of standard alkalines.
Note: to conserve battery power, turn off power consuming camera features when not using them such as the LCD and continuous autofocus.
Related reading: Battery capacityhttp://www.digicamhelp.com/rechargeable-battery-storage-capacity/index.htmBattery chargers:http://www.digicamhelp.com/digital-camera-battery-chargers/index.htm