Had the same problem myself and have resolved it. Download both NetBookInstaller 8.2 and 8.3 RC4 to your Dell Mini HD. Open 8.2, select your internal HD, uncheck Chameleon, leave everything else as default, apply and reboot. Open installer 8.3, Select your internal HD, make sure Chameleon is checked on, leave rest as default apply and reboot. Now sleep works fine...for me anyway...please let me know how you get on with it. I'm was running A04 with 10.6.1 and 8.3 RC4 when I tried this. My initial install was A04 and retail SL 10.6 with 8.3 RC4 applied.