Seriously man....theres nothing to worry about...just have confidence. If you don't, then that's where you'll mess up.
I guess your right...but wow the MX-1/MX-2 has horrible instructions compared to the arctic silver 5 instructions:
MX-1/MX-2 instructions: http://www.arctic-cooling.com/downloads/installation/install_mx1_retail.pdf
Artic Silver 5 instructions: http://www.arcticsilver.com/pdf/appinstruct/as5/ins_as5_intel_quad_wcap.pdf
I guess the important part to note is to apply the paste in a horizontal line for quad core processors