Originally posted by Zonko
I am planning on installing Slackware and putting in an amd 64bit processor, I have never used Linux before though, how would I go about recompiling the kernel to run on a 64 bit proccessor?
I've just done exactly that - you simply select the AMD64 option in the "processor types and features" section of your 2.6.x kernel.
As has been mentioned, you will need compatible video drivers, but both ATI and nVidia have these available, which should cover most of the major cards.
I suggest following the kernel compilation guide stuck to the top of the Slackware group index here. Configuration itself is a little time-consuming, particularly if it's your first time, but I've found it to be considerably less daunting than it's sometimes made out to be. xconfig makes life much easier.
Prepare to have to do a bit of tweaking after you've finished installing the kernel (potential problems under 2.6.x vary, but on my Acer Aspire 1502LMi laptop via82xx sound and CD mounting seem to be the most notable Things To Fix).
Oh, and you might want to set lilo to normal vga mode in case of framebuffer issues that can result in a blank screen at the console.
I'm in the process of correcting and documenting the problems I've run into and their solutions, although it seems likely that most of the issues I've had to deal with were the result of the hardware on my specific system.
Bitching aside, setting up slackware-current with kernel 2.6.6 optimized for AMD64 shouldn't be too traumatic an experience.
Have fun and good luck!