A developer, squadzone, from xda forums has released his own tweaked version of latest Cyanogen Mod 2.3.7 with Overclocking Kernels. So, those who have been waiting for overclocking their devices, the wait is finally over. Though these OC kernels are not from the developer of original CM7 --maybe he is busy with something, so it will take a while for him to release them-- they work prefectly fine on latest cyanogen mod 2.3.7 developed for Galaxy Mini/Pop GTS5570 by tj_style. Please read and follow the given steps carefully to overclock your galaxy mini/pop.
But, before continuing there are few requirements to be fulfilled to overclock your galaxy mini smart phone. The developer of overclocking kernels recommend us to use his tweaked or modified version of cyanogen mod 7.1.0 with these overclocking kernels, though, I found them working with previous versions of CM7 too. Also, It is required to partition your sd-card and move dalvik cache to sd-ext partition before you use overclocking kernels. You are solely responsible for any consequences resulted due to your negligence and incapability to follow the steps carefully.
Please, Make A Full Nandroid Backup of Your System before proceeding.
1. Download modified Latest Cyanogen Mod 2.3.7 and flash it in clock work mode recovery. If you don't know how to flash a custom rom, please read 'How to Flash a Custom Rom on Samsung Galaxy Mini/Pop?' article first. If the link above is not working you can try this mirror for downloading latest cyanogen mod.
2. If you haven't done it already, Partition your SD Card and then install Darktremor APP2SD Script and then move Dalvik Cache to sdcard. Either use APP2SDGUI app from market or run these commands in terminal emulator to do so:
If your device reboots after you run these commands, don't worry because it's normal. Note although if you have partitioned your sd-card before and installed Darktremor A2SD script, you will need to flash the script again after flashing the new modified cm7 rom.
3. Download Overclocking Kernel and then flash it. To do so, download and copy the OC Kernel to your sdcard then reboot your device into recovery mode. In clock work mod recovery choose Install zip from sdcard>>Choose zip from sdcard>>Select the overclocking kenel you copied earlier and wait for your device to flash it.
Above OC Kernel will let you overclock to maximum 801 MHz CPU speed. If you want to overclock your device beyond that, try this Overclocking Kernel 868 MHz. Also, if your smart phone reboots continuously after overclocking your device, please decrease the Max CPU Speed and find one that is stable for your device.
4. Download NoFrills app from market and use it to set Max CPU Speed of your choice according to your preference. Note that this kernel doesn't let you to overclock your device through CyanogenMod Settings>Performance>CPU Settings in your system settings. So, you need to manually do it and that too with NoFrills CPU Control app.
Also, there are many tips and different versions of OC Kernels available at the developer's thread at xda forum. Please, don't forget to thank him, if you pass by, because all credit goes to him for developing these Overclocking Kernels. If you have any problems regarding the OC Kernels feel free to ask in the comments below or post your queries at this thread on xda forum.