I have an ailing MBP 13" 2.26 Ghz Intel Core 2 Duo w/ 8 gig of RAM, that depsite reinstalls of OSX 10.8.2, using Repair Permissions, etc in Disk Utilities from the installer disk, the Mac is still running irraticaly.
As a prior Apple Solutions Expert I find the best way to troubleshoot this is to wipe the drive clean and reinstall the software, etc. prior to replacing the HD altogether.
Can the Migration Assistant be used to successfully reinstall the User's Account data, such as for Mail data, etc., from a typical FW backup? And if so, are there any precautions, tips or techniques I should be aware of before starting, etc.?
Yes, but don't use Migration Assistant, use Setup Assistant, it's cleaner.