My situation, not too dissimilar from many, is this: First, I had issues with my old hard drive that kept from using time machine, address book syncing with mobile me, shutting down, disk repair, and permissions repair. Next, I did extensive research on each issue and realized the best thing to do was upgrade my hard-drive (from 110 Gigs to 500 Gigs and an additional gig of memory) and start fresh with Snow Leopard I used carbon copy to do a complete bootable copy of my previous hard drive. I do not have any time machine backups. I opted to save time and have a local shop (Onyx here in Atlanta) do the HD install I did not have them do a data move or port. So now I am left with getting all my necessary apps, preferences, and other data (photos, iTunes, etc...) either installed and updated or moved from the old hard-drive. I've run across a few threads on here that talk about these items but I still have a few questions. Some are basic so please forgive me. Will I have any problems reinstalling the applications (like iWork, MS Office 08, Adobe Acrobat 8, Omni Focus, Omni Notetaker, and/or other paid apps) with the serial numbers used on my previous hard-drive? Is it better to reinstall these apps or move them over? How does one move over apps? Is it best to the migration tool? (I've never used the migration tool) I don't want to corrupt my permissions or library files as I had done on my previous harddrive. So will using the migration tool to move apps over move over the corrupted or troubled library files associated with particular apps? Are there good threads that speak to these particular issues? Also, are there helpful guides, online books or sites that speak to these issues? I do want to get a clean start but there are some things I dont' want to lose. Things like my bookmarks in Firefox and Safari, my OmniFocus database. Lastly, the technician thought my original 110 gig hard-drive was about physically die due to how slowly it shut down and given the issues I was having. Does anyone have any thoughts on this? You're help will be greatly appreciated.