Install kies while having your phone connected might solve the problem.
If you are talking about 'swype' keyboard you can get it at beta.swype.com for free after registering.
Power button locks the phone by default.
To overclock download any of the oc modules from Free File Hosting Made Simple - MediaFire and flash them in recovery.
The power button is not locking the phone.
And the normal Samsung keyboard.(I found its touch more responsive)
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