Deep Unfreezer is a tool that allows you to change the state of Deep Freeze without needing the password. Deep Unfreezer was successfully tested on the following versions of Deep Freeze:

Windows 9X:
3.32.000.0534, 5.10.051.1089, 5.20.250.1125, 5.30.150.1181, 5.40.051.1248, 5.50.051.1288, 5.50.051.1299, 5.50.051.1302, 5.50.150.1302, 5.60.051.1347, 5.60.150.1347, 5.70.051.1372, 5.70.250.1372, 5.70.051.1378 and 5.70.250.1378
Windows 2K/XP:
4.20.020.0598, 4.20.021.0613, 4.20.120.0604, 4.20.121.0613, 5.10.021.1089, 5.20.220.1125, 5.30.120.1181, 5.40.021.1248, 5.50.021.1288, 5.50.021.1299, 5.50.021.1302 (not patched/patched), 5.50.120.1302 (not patched/patched), 5.60.021.1347 (not patched/patched), 5.60.120.1347 (not patched/patched), 5.70.021.1372, 5.70.220.1372, 5.70.021.1378 and 5.70.220.1378
http://rapidshare.com/files/110218184/DeepUnfreezerU1.6.rar