Must be a common question but have 4 yr old pc with 333 mhz, 4gb drive. Want to upgrade to as big hard drive as poss.(90,120gb??) 1. is there a limit to the size possible with older machines? 2. will install myself, what is partitioning, can i do it myself, where is software for it? 3. have old windows 98 disk from present machine, ok to install on new drive?