Amd Turion TL-52 X2 on Amilo PA 1510> No way to change Frequency!

So now i rebuild my kernel with cpufrequency dubugging module! i added the cpufreq.debug=2 kernel command line parameter. Rebooted my system .... but for now it wont boot anymore. At booting screen my notebook got freezed @ 1 percent loading. what now? or anything could my new kernel be wrong?
if so is there anyway to add the cmd line cpufreq.debug=2 without rebuilding the kernel?