"I have relised that P-PRO doesn't like long footage"
Does PPro lockup when you import long clips? If not, just drag the edges to the start and stop time you want. If it does lockup and you cant use PPro, try Windows movie maker to cut down the video to the sizes you want. You will be with an unnessecary compression hit this way. Here's a link to a free video splitter you can try.
http://www.doeasier.org/splitter/
Hope this helps, Danny