Thanks for your help guys, I'll give it a try

Hi All,
Is there someone on here that can help me?

When trying to start up my Bitcoin-QT version 0.7.2, as it starts to load it comes up with 'error loading blkindex.dat' I press ok and the program closes down.

From looking at other posts on here it looks like I have to reload the entire client again. It took 6 days to download last time and would prefer not to again.

Am I able to download the new 0.8 client and move the wallet.dat file?
Or can I take my wallet.dat file and use it on another lightweight client to access my coins? if so which one?

Also, how am I able to get my 'private key'?

Many thanks in advance

Bobby