merging patitions

I'm going to be doing a format of my c: drive followed by a full reinstall and update, and I had a question. my main hard drive, is split into a 30 gig (c) and a 130 gig (d) partition. iv been looking for instructions on how to merge these back into one single drive, but I'm coming up empty besides 'use partition magic'. anyone have any advice for me? thanks.

hey a guy at best buy was telling me once that he would run windows and used linux to fix the bugs (viruses freezes etc.) to make a really decent setup. would merging a partiton of windows with linux do that?