Contact me as directly as possible for help!
If you are experiencing crashes please make sure you've got the lastest version of Java for your system (guide). You'll be surprised how much it helps.
You may be able to find out more about your problem from the crash report. The default location for crash reports is %appdata%\ .technic\modpacks\creatures-of-nature\crash-reports
Otherwise please upload your crash report to pastebin and send the link my way. I will only be able to help fix the crash if it is a problem with the modpack itself, not if it's a bug with a mod or your system.